iceweasel-1:48.0.deb1-1: updating version

8 files changed, 2057 insertions, 1501 deletions

diff --git a/libre/iceweasel/PKGBUILD b/libre/iceweasel/PKGBUILD
index dd0b0c5d8..fc9337e36 100644
--- a/libre/iceweasel/PKGBUILD
+++ b/libre/iceweasel/PKGBUILD
@@ -16,9 +16,9 @@ _pgo=false
 
 # We're getting this from Debian Sid
 _debname=firefox
-_brandingver=45.0
-_brandingrel=2
-_debver=47.0.1
+_brandingver=48.0
+_brandingrel=1
+_debver=48.0
 _debrel=deb1
 _debrepo=http://ftp.debian.org/debian/pool/main/
 _parabolarepo=https://repo.parabola.nu/other/iceweasel
@@ -34,7 +34,7 @@ pkgdesc="A libre version of Debian Iceweasel, the standalone web browser based o
 arch=(i686 x86_64)
 license=(MPL GPL LGPL)
 depends=(alsa-lib dbus-glib ffmpeg gtk2 gtk3 hunspell icu=57.1 libevent libvpx=1.5.0 libxt mime-types mozilla-common nss sqlite startup-notification ttf-font)
-makedepends=(autoconf2.13 diffutils gconf imagemagick imake inetutils libidl2 libpulse librsvg-stable libxslt mesa mozilla-searchplugins pkg-config python2 quilt unzip yasm zip)
+makedepends=(autoconf2.13 diffutils gconf imagemagick imake inetutils libidl2 libpulse librsvg-stable libxslt mesa mozilla-searchplugins pkg-config python2 quilt rust unzip yasm zip)
 options=(!emptydirs !makeflags debug)
 if $_pgo; then
   makedepends+=(xorg-server-xvfb)
@@ -51,6 +51,7 @@ source=("$_debrepo/`debfile $_debname`_$_debver.orig.tar.xz"
         "$_parabolarepo/${pkgname}_$_brandingver-$_brandingrel.branding.tar.xz.sig"
         mozconfig
         libre.patch
+        remove-default-and-shell-icons-in-packaging-manifest.patch
         gnu_headshadow.png
         drm-free.png
         $pkgname.desktop
@@ -58,24 +59,21 @@ source=("$_debrepo/`debfile $_debname`_$_debver.orig.tar.xz"
         vendor.js
         no-libnotify.patch
         $pkgname-gtk3-20.patch
-        mozilla-1245076.patch
-        mozilla-1245076-1.patch
         enable-object-directory-paths.patch)
-sha256sums=('9e018efdb271b31290c99f75a4648f0eee752ed7802f041699efa46b903f04da'
-            '6ba23fa1c989a06f021264109adc0a2b0b5b4c52f8fef5ff6762869867f970ba'
-            '69736106a9c96fdbca2fb82bd8fbceddf2ab87940ff42bc92cfaed716363310e'
+sha256sums=('032cc7c6da26b4336a6e0cea41a2821a149469b5cdeaec66723bf256bbf13ec5'
+            'bda6131cb58bedfb33ed372ab0b8ad666f8b6b310f4788c7415efb9e3ae30ec6'
+            '0c4ce096711629db4a5f15415b9d752fd77c4eab7bfd22bd3cb6640ed9cbf861'
             'SKIP'
-            '2b46569741e6939d945a7dbee424418a2d56e5a15283fa5eee3bad50ab4d5ce7'
-            'b6679e1fe6b25be59a25490a97d1ff7bef6ca660af928052b14fd0d8dd13175f'
+            '6891d6237312914b579c632b71f9e4f613e7b00bbf2fd7ce53b4cf681820f609'
+            '013af398e97da9e855a143582816bf819e0d9d8d2b0e323d6b832f3df1157fdd'
+            '32f1fe3ad4f80d0ae419064db2abe49b97cd7cb18c35d68be1a2befb60172a2a'
             '93e3001ce152e1d142619e215a9ef07dd429943b99d21726c25da9ceb31e31cd'
             '56eba484179c7f498076f8dc603d8795e99dce8c6ea1da9736318c59d666bff6'
             '2257dc69886bd0b72c48675a27c3a88b9cf6b598252c9e9f1c99763180684fc3'
             '3aea6676f1e53a09673b6ae219d281fc28054beb6002b09973611c02f827651d'
-            '0102d0d8d0833691865cc8e27050da929d899ec4a26327b519ca7e4fdff6802a'
+            'eb22f6a5dfea240f7c5e5f6148796159037ec597d44c90ded4cc1d2d7daa5914'
             'e4ebdd14096d177d264a7993dbd5df46463605ff45f783732c26d30b9caa53a7'
-            'd5e1b9a702dc693184494899fc4cd57ac206e1fd5415a8e5520b8ff3b822e734'
-            '05574c7d0f259da161bcd0e2e8bc9a19401e620ff29439da935d349eebb60efa'
-            '6e7cba25c52b246da183b8309e7b56208bd991d1a7adb40063c5702a6f3722ea'
+            'c984c8bda3c173349d98f3fa71ec8ff8e8b74e6ca20a3f39f33596dbb4c4d1e8'
             'e260e555b261aabab1e48786dd514eeea056e4402af7cfd4dfd1d32858441484')
 validpgpkeys=(
               'C92BAA713B8D53D3CAE63FC9E6974752F9704456' # André Silva
@@ -99,6 +97,9 @@ prepare() {
   install -m644 "$srcdir/"{gnu_headshadow,drm-free}.png \
     browser/base/content/abouthome
 
+  # Useless since we are doing it ourselves
+  patch -Np1 -i "$srcdir/remove-default-and-shell-icons-in-packaging-manifest.patch"
+
   # Enable object directory paths for Iceweasel rebranding
   patch -Np1 -i "$srcdir/enable-object-directory-paths.patch"
 
@@ -108,10 +109,6 @@ prepare() {
   # https://bugzilla.mozilla.org/show_bug.cgi?id=1234158
   patch -Np1 -i "$srcdir/$pkgname-gtk3-20.patch"
 
-  # GCC 6
-  patch -Np1 -i ../mozilla-1245076.patch
-  patch -Np1 -i ../mozilla-1245076-1.patch
-
   # Notifications with libnotify are broken
   # https://bugzilla.mozilla.org/show_bug.cgi?id=1236150
   patch -Np1 -i "$srcdir/no-libnotify.patch"
@@ -148,7 +145,6 @@ build() {
   LDFLAGS+=" -Wl,-z,now"
 
   # GCC 6
-  CFLAGS+=" -fno-delete-null-pointer-checks -fno-lifetime-dse -fno-schedule-insns2"
   CXXFLAGS+=" -fno-delete-null-pointer-checks -fno-lifetime-dse -fno-schedule-insns2"
 
   export PATH="$srcdir/path:$PATH"
diff --git a/libre/iceweasel/iceweasel-gtk3-20.patch b/libre/iceweasel/iceweasel-gtk3-20.patch
index a8c0ccdfb..eccbc5e8d 100644
--- a/libre/iceweasel/iceweasel-gtk3-20.patch
+++ b/libre/iceweasel/iceweasel-gtk3-20.patch
@@ -1,1159 +1,1320 @@
-diff -up firefox-47.0/widget/gtk/gtk3drawing.c.gtk3-20 firefox-47.0/widget/gtk/gtk3drawing.c
---- firefox-47.0/widget/gtk/gtk3drawing.c.gtk3-20	2016-06-01 06:11:44.000000000 +0200
-+++ firefox-47.0/widget/gtk/gtk3drawing.c	2016-06-23 10:21:37.072462099 +0200
-@@ -17,34 +17,85 @@
+diff -up firefox-48.0/widget/gtk/gtk3drawing.cpp.gtk3-20 firefox-48.0/widget/gtk/gtk3drawing.cpp
+--- firefox-48.0/widget/gtk/gtk3drawing.cpp.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/gtk3drawing.cpp	2016-07-29 09:15:11.822285857 +0200
+@@ -18,15 +18,9 @@
  
  #include <math.h>
  
-+#define MOZ_WIDGET_STYLES 4
-+
-+typedef struct {
-+    GtkWidget*            widget;
-+
-+    union {
-+        struct {
-+            GtkStyleContext*  style;
-+            GtkStyleContext*  styleSelection;
-+        } entry;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+        } button;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+        } tooltip;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+            GtkStyleContext*  styleContents;
-+            GtkStyleContext*  styleTrough;
-+            GtkStyleContext*  styleSlider;
-+        } scroll;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+            GtkStyleContext*  styleCheck;
-+            GtkStyleContext*  styleLabel;
-+        } check;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+            GtkStyleContext*  styleTrough;
-+            GtkStyleContext*  styleProgress;
-+        } progress;
-+
-+        struct {
-+            GtkStyleContext*  style;
-+            GtkStyleContext*  styleEntry;
-+            GtkStyleContext*  styleButtonUp;
-+            GtkStyleContext*  styleButtonDown;
-+        } spin;
-+
-+        struct {
-+            GtkStyleContext*  style[MOZ_WIDGET_STYLES];
-+        } all;
-+    };
-+} MozGtkWidget;
-+
- static GtkWidget* gProtoWindow;
+-static GtkWidget* gProtoWindow;
  static GtkWidget* gProtoLayout;
 -static GtkWidget* gButtonWidget;
-+static MozGtkWidget gButton;
- static GtkWidget* gToggleButtonWidget;
- static GtkWidget* gButtonArrowWidget;
--static GtkWidget* gCheckboxWidget;
--static GtkWidget* gRadiobuttonWidget;
--static GtkWidget* gHorizScrollbarWidget;
--static GtkWidget* gVertScrollbarWidget;
+-static GtkWidget* gToggleButtonWidget;
+-static GtkWidget* gButtonArrowWidget;
 -static GtkWidget* gSpinWidget;
-+static MozGtkWidget gCheckbox;
-+static MozGtkWidget gRadiobutton;
-+static MozGtkWidget gVertScrollbar;
-+static MozGtkWidget gHorizScrollbar;
-+static MozGtkWidget gSpin;
  static GtkWidget* gHScaleWidget;
  static GtkWidget* gVScaleWidget;
 -static GtkWidget* gEntryWidget;
-+static MozGtkWidget gEntry;
  static GtkWidget* gComboBoxWidget;
  static GtkWidget* gComboBoxButtonWidget;
  static GtkWidget* gComboBoxArrowWidget;
- static GtkWidget* gComboBoxSeparatorWidget;
- static GtkWidget* gComboBoxEntryWidget;
--static GtkWidget* gComboBoxEntryTextareaWidget;
-+static MozGtkWidget gComboBoxEntryTextarea;
+@@ -35,30 +29,15 @@ static GtkWidget* gComboBoxEntryWidget;
+ static GtkWidget* gComboBoxEntryTextareaWidget;
  static GtkWidget* gComboBoxEntryButtonWidget;
  static GtkWidget* gComboBoxEntryArrowWidget;
- static GtkWidget* gHandleBoxWidget;
- static GtkWidget* gToolbarWidget;
- static GtkWidget* gFrameWidget;
- static GtkWidget* gStatusbarWidget;
+-static GtkWidget* gHandleBoxWidget;
+-static GtkWidget* gToolbarWidget;
+-static GtkWidget* gFrameWidget;
 -static GtkWidget* gProgressWidget;
-+static MozGtkWidget gProgressBar;
  static GtkWidget* gTabWidget;
+-static GtkWidget* gTextViewWidget;
 -static GtkWidget* gTooltipWidget;
-+static MozGtkWidget gTooltip;
- static GtkWidget* gMenuBarWidget;
- static GtkWidget* gMenuBarItemWidget;
- static GtkWidget* gMenuPopupWidget;
-@@ -78,6 +129,37 @@ static gboolean is_initialized;
- #define GTK_STATE_FLAG_CHECKED (1 << 11)
- #endif
- 
-+void moz_gtk_widget_free(MozGtkWidget *aMozWidget)
-+{
-+    // This was removed as a child of gProtoWindow
-+    if (aMozWidget->widget) {
-+        aMozWidget->widget = NULL;
-+    }
-+
-+    for(int i = 0; i < MOZ_WIDGET_STYLES; i++) {
-+        if (aMozWidget->all.style[i]) {
-+            g_object_unref(aMozWidget->all.style[i]);
-+            aMozWidget->all.style[i] = NULL;
-+        }
-+    }
-+}
-+
-+// TODO - weak dep!! (dlsym)
-+#if GTK_CHECK_VERSION(3, 19, 2)
-+#define moz_gtk_path_set_class_name    gtk_widget_path_iter_set_object_name
-+#else
-+#define moz_gtk_path_set_class_name    gtk_widget_path_iter_add_class
-+#endif
-+//gtk_widget_path_iter_get_state
-+
-+static void
-+moz_gtk_get_style_border(GtkStyleContext* style, GtkStateFlags state_flags,
-+                         GtkBorder *border);
-+
-+static void
-+moz_gtk_get_style_padding(GtkStyleContext* style, GtkStateFlags state_flags,
-+                          GtkBorder *padding);
-+
- static GtkStateFlags
- GetStateFlagsFromGtkWidgetState(GtkWidgetState* state)
- {
-@@ -97,6 +179,41 @@ GetStateFlagsFromGtkWidgetState(GtkWidge
+-static GtkWidget* gMenuBarWidget;
+-static GtkWidget* gMenuBarItemWidget;
+-static GtkWidget* gMenuPopupWidget;
+-static GtkWidget* gMenuItemWidget;
+ static GtkWidget* gImageMenuItemWidget;
+ static GtkWidget* gCheckMenuItemWidget;
+ static GtkWidget* gTreeViewWidget;
+ static GtkTreeViewColumn* gMiddleTreeViewColumn;
+ static GtkWidget* gTreeHeaderCellWidget;
+ static GtkWidget* gTreeHeaderSortArrowWidget;
+-static GtkWidget* gExpanderWidget;
+-static GtkWidget* gToolbarSeparatorWidget;
+-static GtkWidget* gMenuSeparatorWidget;
+ static GtkWidget* gHPanedWidget;
+ static GtkWidget* gVPanedWidget;
+-static GtkWidget* gScrolledWindowWidget;
+-static GtkWidget* gInfoBar;
+ 
+ static style_prop_t style_prop_func;
+ static gboolean have_arrow_scaling;
+@@ -94,15 +73,6 @@ GetStateFlagsFromGtkWidgetState(GtkWidge
      return stateFlags;
  }
  
-+GtkStyleContext *
-+moz_gtk_style_create(GtkCssNode *node, GtkStyleContext *parent)
-+{
-+  GtkWidgetPath *path;
-+  GtkStyleContext *context;
-+
-+  if (parent)
-+    path = gtk_widget_path_copy (gtk_style_context_get_path (parent));
-+  else
-+    path = gtk_widget_path_new ();
-+
-+  gtk_widget_path_append_type (path, node->type);
-+  if (node->name)
-+    moz_gtk_path_set_class_name(path, -1, node->name);
-+  if (node->class1)
-+    gtk_widget_path_iter_add_class(path, -1, node->class1);
-+  if (node->class2)
-+    gtk_widget_path_iter_add_class(path, -1, node->class2);
-+
-+  context = gtk_style_context_new ();
-+  gtk_style_context_set_path (context, path);
-+  gtk_style_context_set_parent (context, parent);
-+
-+  if(!gtk_check_version(3, 14, 0)) {
-+      /* Unfortunately, we have to explicitly set the state again here
-+       * for it to take effect
-+       */
-+      gtk_style_context_set_state (context, gtk_widget_path_iter_get_state (path, -1));
-+  }
-+
-+  gtk_widget_path_unref (path);
-+
-+  return context;
-+}
-+
- /* Because we have such an unconventional way of drawing widgets, signal to the GTK theme engine
-    that they are drawing for Mozilla instead of a conventional GTK app so they can do any specific
-    things they may want to do. */
-@@ -141,9 +258,16 @@ setup_widget_prototype(GtkWidget* widget
- static gint
- ensure_button_widget()
- {
--    if (!gButtonWidget) {
--        gButtonWidget = gtk_button_new_with_label("M");
--        setup_widget_prototype(gButtonWidget);
-+    if (!gButton.widget) {
-+        GtkCssNode path[] = { 
-+            { GTK_TYPE_BUTTON, "button", NULL, NULL }
-+        };
-+
-+        gButton.widget = gtk_button_new_with_label("M");
-+        setup_widget_prototype(gButton.widget);
-+        gtk_widget_show(gButton.widget);
-+
-+        gButton.button.style = moz_gtk_style_create(&path[0], NULL);
-     }
-     return MOZ_GTK_SUCCESS;
- }
-@@ -195,9 +319,21 @@ ensure_button_arrow_widget()
- static gint
- ensure_checkbox_widget()
+-/* Because we have such an unconventional way of drawing widgets, signal to the GTK theme engine
+-   that they are drawing for Mozilla instead of a conventional GTK app so they can do any specific
+-   things they may want to do. */
+-static void
+-moz_gtk_set_widget_name(GtkWidget* widget)
+-{
+-    gtk_widget_set_name(widget, "MozillaGtkWidget");
+-}
+-
+ gint
+ moz_gtk_enable_style_props(style_prop_t styleGetProp)
  {
--    if (!gCheckboxWidget) {
--        gCheckboxWidget = gtk_check_button_new_with_label("M");
--        setup_widget_prototype(gCheckboxWidget);
-+   if (!gCheckbox.widget) {
-+        GtkCssNode path[] = {
-+           { GTK_TYPE_TOGGLE_BUTTON, "checkbutton", NULL, NULL },
-+           { G_TYPE_NONE, "check", NULL, NULL },
-+           { G_TYPE_NONE, "label", NULL, NULL }
-+        };
-+
-+        gCheckbox.widget = gtk_check_button_new_with_label("M");
-+        setup_widget_prototype(gCheckbox.widget);
-+
-+        gCheckbox.check.style = moz_gtk_style_create(&path[0], NULL);
-+        gCheckbox.check.styleCheck = moz_gtk_style_create(&path[1],
-+                                       gCheckbox.check.style);
-+        gCheckbox.check.styleLabel = moz_gtk_style_create(&path[2],
-+                                       gCheckbox.check.style);
-     }
-     return MOZ_GTK_SUCCESS;
+@@ -111,15 +81,6 @@ moz_gtk_enable_style_props(style_prop_t
  }
-@@ -205,9 +341,21 @@ ensure_checkbox_widget()
+ 
  static gint
- ensure_radiobutton_widget()
+-ensure_window_widget()
+-{
+-    if (!gProtoWindow) {
+-        gProtoWindow = GetWidget(MOZ_GTK_WINDOW);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+ setup_widget_prototype(GtkWidget* widget)
  {
--    if (!gRadiobuttonWidget) {
--        gRadiobuttonWidget = gtk_radio_button_new_with_label(NULL, "M");
--        setup_widget_prototype(gRadiobuttonWidget);
-+    if (!gRadiobutton.widget) {
-+        GtkCssNode path[] = {
-+           { GTK_TYPE_TOGGLE_BUTTON, "radiobutton", NULL, NULL },
-+           { G_TYPE_NONE, "radio", NULL, NULL },
-+           { G_TYPE_NONE, "label", NULL, NULL }
-+        };
-+
-+        gRadiobutton.widget = gtk_radio_button_new_with_label(NULL, "M");
-+        setup_widget_prototype(gRadiobutton.widget);
-+
-+        gRadiobutton.check.style = moz_gtk_style_create(&path[0], NULL);
-+        gRadiobutton.check.styleCheck = moz_gtk_style_create(&path[1],
-+                                          gRadiobutton.check.style);
-+        gRadiobutton.check.styleLabel = moz_gtk_style_create(&path[2],
-+                                          gRadiobutton.check.style);
-     }
-     return MOZ_GTK_SUCCESS;
+     if (!gProtoLayout) {
+@@ -130,16 +91,6 @@ setup_widget_prototype(GtkWidget* widget
  }
-@@ -215,25 +363,62 @@ ensure_radiobutton_widget()
+ 
  static gint
- ensure_scrollbar_widget()
- {
--    if (!gVertScrollbarWidget) {
--        gVertScrollbarWidget = gtk_scrollbar_new(GTK_ORIENTATION_VERTICAL, NULL);
--        setup_widget_prototype(gVertScrollbarWidget);
--    }
--    if (!gHorizScrollbarWidget) {
--        gHorizScrollbarWidget = gtk_scrollbar_new(GTK_ORIENTATION_HORIZONTAL, NULL);
--        setup_widget_prototype(gHorizScrollbarWidget);
+-ensure_button_widget()
+-{
+-    if (!gButtonWidget) {
+-        gButtonWidget = gtk_button_new_with_label("M");
+-        setup_widget_prototype(gButtonWidget);
 -    }
-+    if (!gVertScrollbar.widget && !gHorizScrollbar.widget) {
-+        GtkCssNode path[] = {
-+            { GTK_TYPE_SCROLLBAR, "scrollbar", "horizontal", "bottom"},
-+            { GTK_TYPE_SCROLLBAR, "scrollbar", "vertical", "right" },
-+            { G_TYPE_NONE, "contents", NULL, NULL },
-+            { G_TYPE_NONE, "trough", NULL, NULL },
-+            { G_TYPE_NONE, "slider", NULL, NULL }
-+        };
-+
-+        gHorizScrollbar.widget = gtk_scrollbar_new(GTK_ORIENTATION_HORIZONTAL, NULL);
-+        setup_widget_prototype(gHorizScrollbar.widget);
-+
-+        gHorizScrollbar.scroll.style = moz_gtk_style_create(path, NULL);
-+        gHorizScrollbar.scroll.styleContents = moz_gtk_style_create(path+2, 
-+                                               gHorizScrollbar.scroll.style);
-+        gHorizScrollbar.scroll.styleTrough = moz_gtk_style_create(path+3, 
-+                                               gHorizScrollbar.scroll.styleContents);
-+        gHorizScrollbar.scroll.styleSlider = moz_gtk_style_create(path+4, 
-+                                               gHorizScrollbar.scroll.styleTrough);
-+
-+        gVertScrollbar.widget = gtk_scrollbar_new(GTK_ORIENTATION_VERTICAL, NULL);
-+        setup_widget_prototype(gVertScrollbar.widget);
-+
-+        gVertScrollbar.scroll.style = moz_gtk_style_create(path+1, NULL);
-+        gVertScrollbar.scroll.styleContents = moz_gtk_style_create(path+2, 
-+                                              gVertScrollbar.scroll.style);
-+        gVertScrollbar.scroll.styleTrough = moz_gtk_style_create(path+3, 
-+                                              gVertScrollbar.scroll.styleContents);
-+        gVertScrollbar.scroll.styleSlider = moz_gtk_style_create(path+4, 
-+                                              gVertScrollbar.scroll.styleTrough);
-+
-+     }
-     return MOZ_GTK_SUCCESS;
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+ ensure_hpaned_widget()
+ {
+     if (!gHPanedWidget) {
+@@ -160,40 +111,6 @@ ensure_vpaned_widget()
  }
  
  static gint
- ensure_spin_widget()
- {
+-ensure_toggle_button_widget()
+-{
+-    if (!gToggleButtonWidget) {
+-        gToggleButtonWidget = gtk_toggle_button_new();
+-        setup_widget_prototype(gToggleButtonWidget);
+-  }
+-  return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_button_arrow_widget()
+-{
+-    if (!gButtonArrowWidget) {
+-        ensure_toggle_button_widget();
+-
+-        gButtonArrowWidget = gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_OUT);
+-        gtk_container_add(GTK_CONTAINER(gToggleButtonWidget), gButtonArrowWidget);
+-        gtk_widget_realize(gButtonArrowWidget);
+-        gtk_widget_show(gButtonArrowWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_spin_widget()
+-{
 -  if (!gSpinWidget) {
 -    gSpinWidget = gtk_spin_button_new(NULL, 1, 0);
 -    setup_widget_prototype(gSpinWidget);
 -  }
 -  return MOZ_GTK_SUCCESS;
-+    if (!gSpin.widget) {
-+        GtkCssNode path[] = {
-+            { GTK_TYPE_SPIN_BUTTON, "spinbutton", "horizontal", NULL },
-+            { GTK_TYPE_SPIN_BUTTON, "spinbutton", "vertical", NULL },
-+            { GTK_TYPE_ENTRY, "entry", NULL, NULL },
-+            { G_TYPE_NONE, "button", "up", NULL },
-+            { G_TYPE_NONE, "button", "down", NULL }
-+        };
-+
-+        gSpin.widget = gtk_spin_button_new(NULL, 1, 0);
-+        setup_widget_prototype(gSpin.widget);
-+
-+        gSpin.spin.style = moz_gtk_style_create(path, NULL);
-+        gSpin.spin.styleButtonUp = moz_gtk_style_create(path+3, gSpin.spin.style);
-+        gSpin.spin.styleButtonDown = moz_gtk_style_create(path+4, gSpin.spin.style);
-+        gSpin.spin.styleEntry = moz_gtk_style_create(path+2, gSpin.spin.style);
-+    }
-+    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+ ensure_scale_widget()
+ {
+   if (!gHScaleWidget) {
+@@ -207,16 +124,6 @@ ensure_scale_widget()
+   return MOZ_GTK_SUCCESS;
  }
  
- static gint
-@@ -253,9 +438,19 @@ ensure_scale_widget()
- static gint
- ensure_entry_widget()
- {
+-static gint
+-ensure_entry_widget()
+-{
 -    if (!gEntryWidget) {
 -        gEntryWidget = gtk_entry_new();
 -        setup_widget_prototype(gEntryWidget);
-+    if (!gEntry.widget) {
-+        GtkCssNode path[] = { 
-+            { GTK_TYPE_ENTRY, "entry", NULL, NULL },
-+            { G_TYPE_NONE, "selection", NULL, NULL }
-+        };
-+
-+        gEntry.widget = gtk_entry_new();
-+        setup_widget_prototype(gEntry.widget);
-+        gtk_widget_show(gEntry.widget);
-+
-+        gEntry.entry.style = moz_gtk_style_create(&path[0], NULL);
-+        gEntry.entry.styleSelection = moz_gtk_style_create(&path[1], 
-+                                                           gEntry.entry.style);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+ /* We need to have pointers to the inner widgets (button, separator, arrow)
+  * of the ComboBox to get the correct rendering from theme engines which
+  * special cases their look. Since the inner layout can change, we ask GTK
+@@ -225,7 +132,7 @@ ensure_entry_widget()
+  * g_object_add_weak_pointer().
+  * Note that if we don't find the inner widgets (which shouldn't happen), we
+  * fallback to use generic "non-inner" widgets, and they don't need that kind
+- * of weak pointer since they are explicit children of gProtoWindow and as
++ * of weak pointer since they are explicit children of gProtoLayout and as
+  * such GTK holds a strong reference to them. */
+ static void
+ moz_gtk_get_combo_box_inner_button(GtkWidget *widget, gpointer client_data)
+@@ -297,16 +204,14 @@ ensure_combo_box_widgets()
+         /* Shouldn't be reached with current internal gtk implementation; we
+          * use a generic toggle button as last resort fallback to avoid
+          * crashing. */
+-        ensure_toggle_button_widget();
+-        gComboBoxButtonWidget = gToggleButtonWidget;
++        gComboBoxButtonWidget = GetWidget(MOZ_GTK_TOGGLE_BUTTON);
+     }
+ 
+     if (!gComboBoxArrowWidget) {
+         /* Shouldn't be reached with current internal gtk implementation;
+          * we gButtonArrowWidget as last resort fallback to avoid
+          * crashing. */
+-        ensure_button_arrow_widget();
+-        gComboBoxArrowWidget = gButtonArrowWidget;
++        gComboBoxArrowWidget = GetWidget(MOZ_GTK_BUTTON_ARROW);
      }
+ 
+     /* We don't test the validity of gComboBoxSeparatorWidget since there
+@@ -316,15 +221,6 @@ ensure_combo_box_widgets()
      return MOZ_GTK_SUCCESS;
  }
-@@ -387,9 +582,9 @@ moz_gtk_get_combo_box_entry_inner_widget
-         g_object_add_weak_pointer(G_OBJECT(widget),
-                                   (gpointer) &gComboBoxEntryButtonWidget);
-     } else if (GTK_IS_ENTRY(widget)) {
--        gComboBoxEntryTextareaWidget = widget;
-+        gComboBoxEntryTextarea.widget = widget;
-         g_object_add_weak_pointer(G_OBJECT(widget),
--                                  (gpointer) &gComboBoxEntryTextareaWidget);
-+                                  (gpointer) &gComboBoxEntryTextarea.widget);
-     } else
-         return;
-     gtk_widget_realize(widget);
-@@ -411,7 +606,7 @@ ensure_combo_box_entry_widgets()
- {
-     GtkWidget* buttonChild;
- 
--    if (gComboBoxEntryTextareaWidget &&
-+    if (gComboBoxEntryTextarea.widget &&
-             gComboBoxEntryButtonWidget &&
-             gComboBoxEntryArrowWidget)
-         return MOZ_GTK_SUCCESS;
-@@ -427,9 +622,9 @@ ensure_combo_box_entry_widgets()
-                          moz_gtk_get_combo_box_entry_inner_widgets,
+ 
+-static void
+-ensure_info_bar()
+-{
+-  if (!gInfoBar) {
+-      gInfoBar = gtk_info_bar_new();
+-      setup_widget_prototype(gInfoBar);
+-  }
+-}
+-
+ /* We need to have pointers to the inner widgets (entry, button, arrow) of
+  * the ComboBoxEntry to get the correct rendering from theme engines which
+  * special cases their look. Since the inner layout can change, we ask GTK
+@@ -333,7 +229,7 @@ ensure_info_bar()
+  * g_object_add_weak_pointer().
+  * Note that if we don't find the inner widgets (which shouldn't happen), we
+  * fallback to use generic "non-inner" widgets, and they don't need that kind
+- * of weak pointer since they are explicit children of gProtoWindow and as
++ * of weak pointer since they are explicit children of gProtoLayout and as
+  * such GTK holds a strong reference to them. */
+ static void
+ moz_gtk_get_combo_box_entry_inner_widgets(GtkWidget *widget,
+@@ -385,8 +281,7 @@ ensure_combo_box_entry_widgets()
                           NULL);
  
--    if (!gComboBoxEntryTextareaWidget) {
-+    if (!gComboBoxEntryTextarea.widget) {
-         ensure_entry_widget();
+     if (!gComboBoxEntryTextareaWidget) {
+-        ensure_entry_widget();
 -        gComboBoxEntryTextareaWidget = gEntryWidget;
-+        gComboBoxEntryTextarea.widget = gEntry.widget;
++        gComboBoxEntryTextareaWidget = GetWidget(MOZ_GTK_ENTRY);
      }
  
      if (gComboBoxEntryButtonWidget) {
-@@ -507,12 +702,16 @@ ensure_toolbar_separator_widget()
- static gint
- ensure_tooltip_widget()
- {
+@@ -412,68 +307,19 @@ ensure_combo_box_entry_widgets()
+         /* Shouldn't be reached with current internal gtk implementation;
+          * we use a generic toggle button as last resort fallback to avoid
+          * crashing. */
+-        ensure_toggle_button_widget();
+-        gComboBoxEntryButtonWidget = gToggleButtonWidget;
++        gComboBoxEntryButtonWidget = GetWidget(MOZ_GTK_TOGGLE_BUTTON);
+     }
+ 
+     if (!gComboBoxEntryArrowWidget) {
+         /* Shouldn't be reached with current internal gtk implementation;
+          * we gButtonArrowWidget as last resort fallback to avoid
+          * crashing. */
+-        ensure_button_arrow_widget();
+-        gComboBoxEntryArrowWidget = gButtonArrowWidget;
++        gComboBoxEntryArrowWidget = GetWidget(MOZ_GTK_BUTTON_ARROW);
+     }
+ 
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+-
+-static gint
+-ensure_handlebox_widget()
+-{
+-    if (!gHandleBoxWidget) {
+-        gHandleBoxWidget = gtk_handle_box_new();
+-        setup_widget_prototype(gHandleBoxWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_toolbar_widget()
+-{
+-    if (!gToolbarWidget) {
+-        ensure_handlebox_widget();
+-        gToolbarWidget = gtk_toolbar_new();
+-        gtk_container_add(GTK_CONTAINER(gHandleBoxWidget), gToolbarWidget);
+-        gtk_widget_realize(gToolbarWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_toolbar_separator_widget()
+-{
+-    if (!gToolbarSeparatorWidget) {
+-        ensure_toolbar_widget();
+-        gToolbarSeparatorWidget = GTK_WIDGET(gtk_separator_tool_item_new());
+-        setup_widget_prototype(gToolbarSeparatorWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_tooltip_widget()
+-{
 -    if (!gTooltipWidget) {
 -        gTooltipWidget = gtk_window_new(GTK_WINDOW_POPUP);
 -        GtkStyleContext* style = gtk_widget_get_style_context(gTooltipWidget);
 -        gtk_style_context_add_class(style, GTK_STYLE_CLASS_TOOLTIP);
 -        gtk_widget_realize(gTooltipWidget);
 -        moz_gtk_set_widget_name(gTooltipWidget);
-+    if (!gTooltip.widget) {
-+        GtkCssNode path[] = {
-+            { GTK_TYPE_TOOLTIP, "tooltip", "background", NULL},
-+        };
-+
-+        gTooltip.widget = gtk_window_new(GTK_WINDOW_POPUP);
-+        gtk_widget_realize(gTooltip.widget);
-+        moz_gtk_set_widget_name(gTooltip.widget);
-+
-+        gTooltip.tooltip.style = moz_gtk_style_create(&path[0], NULL);
-     }
-     return MOZ_GTK_SUCCESS;
- }
-@@ -530,9 +729,21 @@ ensure_tab_widget()
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
  static gint
- ensure_progress_widget()
+ ensure_tab_widget()
  {
+@@ -485,81 +331,11 @@ ensure_tab_widget()
+ }
+ 
+ static gint
+-ensure_progress_widget()
+-{
 -    if (!gProgressWidget) {
 -        gProgressWidget = gtk_progress_bar_new();
 -        setup_widget_prototype(gProgressWidget);
-+    if (!gProgressBar.widget) {
-+        GtkCssNode path[] = {
-+           { GTK_TYPE_LABEL, "progressbar", NULL, NULL },
-+           { G_TYPE_NONE, "trough", NULL, NULL },
-+           { G_TYPE_NONE, "progress", NULL, NULL },
-+        };
-+
-+        gProgressBar.widget = gtk_progress_bar_new();
-+        setup_widget_prototype(gProgressBar.widget);
-+
-+        gProgressBar.progress.style = moz_gtk_style_create(&path[0], NULL);
-+        gProgressBar.progress.styleTrough = moz_gtk_style_create(&path[1],
-+                                              gProgressBar.progress.style);
-+        gProgressBar.progress.styleProgress = moz_gtk_style_create(&path[2],
-+                                                gProgressBar.progress.styleTrough);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_frame_widget()
+-{
+-    if (!gFrameWidget) {
+-        gFrameWidget = gtk_frame_new(NULL);
+-        setup_widget_prototype(gFrameWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_menu_bar_widget()
+-{
+-    if (!gMenuBarWidget) {
+-        gMenuBarWidget = gtk_menu_bar_new();
+-        setup_widget_prototype(gMenuBarWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_menu_bar_item_widget()
+-{
+-    if (!gMenuBarItemWidget) {
+-        ensure_menu_bar_widget();
+-        gMenuBarItemWidget = gtk_menu_item_new();
+-        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuBarWidget),
+-                              gMenuBarItemWidget);
+-        gtk_widget_realize(gMenuBarItemWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_menu_popup_widget()
+-{
+-    if (!gMenuPopupWidget) {
+-        ensure_window_widget();
+-        gMenuPopupWidget = gtk_menu_new();
+-        gtk_menu_attach_to_widget(GTK_MENU(gMenuPopupWidget), gProtoWindow,
+-                                  NULL);
+-        gtk_widget_realize(gMenuPopupWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_menu_item_widget()
+-{
+-    if (!gMenuItemWidget) {
+-        ensure_menu_popup_widget();
+-        gMenuItemWidget = gtk_menu_item_new_with_label("M");
+-        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
+-                              gMenuItemWidget);
+-        gtk_widget_realize(gMenuItemWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+ ensure_image_menu_item_widget()
+ {
+     if (!gImageMenuItemWidget) {
+-        ensure_menu_popup_widget();
+         gImageMenuItemWidget = gtk_image_menu_item_new();
+-        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
++        gtk_menu_shell_append(GTK_MENU_SHELL(GetWidget(MOZ_GTK_MENUPOPUP)),
+                               gImageMenuItemWidget);
+         gtk_widget_realize(gImageMenuItemWidget);
      }
-     return MOZ_GTK_SUCCESS;
+@@ -567,25 +343,11 @@ ensure_image_menu_item_widget()
  }
-@@ -638,6 +849,11 @@ static gint
+ 
+ static gint
+-ensure_menu_separator_widget()
+-{
+-    if (!gMenuSeparatorWidget) {
+-        ensure_menu_popup_widget();
+-        gMenuSeparatorWidget = gtk_separator_menu_item_new();
+-        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
+-                              gMenuSeparatorWidget);
+-        gtk_widget_realize(gMenuSeparatorWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
  ensure_check_menu_item_widget()
  {
      if (!gCheckMenuItemWidget) {
-+        GtkCssNode path[] = {
-+           { GTK_TYPE_CHECK_MENU_ITEM, "menuitem", NULL, NULL },
-+           { G_TYPE_NONE, "check", NULL, NULL }
-+        };
-+
-         ensure_menu_popup_widget();
-         gCheckMenuItemWidget = gtk_check_menu_item_new_with_label("M");
-         gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
-@@ -752,7 +968,7 @@ moz_gtk_checkbox_get_metrics(gint* indic
- {
-     ensure_checkbox_widget();
- 
--    gtk_widget_style_get (gCheckboxWidget,
-+    gtk_widget_style_get (gCheckbox.widget,
-                           "indicator_size", indicator_size,
-                           "indicator_spacing", indicator_spacing,
-                           NULL);
-@@ -765,7 +981,7 @@ moz_gtk_radio_get_metrics(gint* indicato
+-        ensure_menu_popup_widget();
+-        gCheckMenuItemWidget = gtk_check_menu_item_new_with_label("M");
+-        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
++        gCheckMenuItemWidget = gtk_check_menu_item_new();
++        gtk_menu_shell_append(GTK_MENU_SHELL(GetWidget(MOZ_GTK_MENUPOPUP)),
+                               gCheckMenuItemWidget);
+         gtk_widget_realize(gCheckMenuItemWidget);
+     }
+@@ -646,37 +408,6 @@ ensure_tree_header_cell_widget()
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+-static gint
+-ensure_expander_widget()
+-{
+-    if (!gExpanderWidget) {
+-        gExpanderWidget = gtk_expander_new("M");
+-        setup_widget_prototype(gExpanderWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static gint
+-ensure_scrolled_window_widget()
+-{
+-    if (!gScrolledWindowWidget) {
+-        gScrolledWindowWidget = gtk_scrolled_window_new(NULL, NULL);
+-        setup_widget_prototype(gScrolledWindowWidget);
+-    }
+-    return MOZ_GTK_SUCCESS;
+-}
+-
+-static void
+-ensure_text_view_widget()
+-{
+-    if (gTextViewWidget)
+-        return;
+-
+-    gTextViewWidget = gtk_text_view_new();
+-    ensure_scrolled_window_widget();
+-    gtk_container_add(GTK_CONTAINER(gScrolledWindowWidget), gTextViewWidget);
+-}
+-
+ gint
+ moz_gtk_init()
  {
-     ensure_radiobutton_widget();
- 
--    gtk_widget_style_get (gRadiobuttonWidget,
-+    gtk_widget_style_get (gRadiobutton.widget,
-                           "indicator_size", indicator_size,
-                           "indicator_spacing", indicator_spacing,
-                           NULL);
-@@ -778,13 +994,13 @@ moz_gtk_get_focus_outline_size(gint* foc
+@@ -729,26 +460,21 @@ moz_gtk_get_focus_outline_size(gint* foc
  {
      GtkBorder border;
      GtkBorder padding;
 -    GtkStyleContext *style;
-+    GtkStyleContext* style;
- 
-     ensure_entry_widget();
+-
+-    ensure_entry_widget();
 -    style = gtk_widget_get_style_context(gEntryWidget);
- 
--    gtk_style_context_get_border(style, 0, &border);
--    gtk_style_context_get_padding(style, 0, &padding);
-+    style = gEntry.entry.style;
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
+-
++    GtkStyleContext *style = ClaimStyleContext(MOZ_GTK_ENTRY);
+     gtk_style_context_get_border(style, GTK_STATE_FLAG_NORMAL, &border);
+     gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
      *focus_h_width = border.left + padding.left;
      *focus_v_width = border.top + padding.top;
++    ReleaseStyleContext(style);
      return MOZ_GTK_SUCCESS;
-@@ -821,7 +1037,7 @@ moz_gtk_button_get_default_overflow(gint
-     GtkBorder* default_outside_border;
- 
-     ensure_button_widget();
--    gtk_widget_style_get(gButtonWidget,
-+    gtk_widget_style_get(gButton.widget,
-                          "default-outside-border", &default_outside_border,
-                          NULL);
- 
-@@ -844,7 +1060,7 @@ moz_gtk_button_get_default_border(gint*
-     GtkBorder* default_border;
+ }
  
-     ensure_button_widget();
--    gtk_widget_style_get(gButtonWidget,
-+    gtk_widget_style_get(gButton.widget,
-                          "default-border", &default_border,
-                          NULL);
+ gint
+ moz_gtk_menuitem_get_horizontal_padding(gint* horizontal_padding)
+ {
+-    ensure_menu_item_widget();
+-
+-    gtk_style_context_get_style(gtk_widget_get_style_context(gMenuItemWidget),
+-                                "horizontal-padding", horizontal_padding,
+-                                NULL);
++    gtk_widget_style_get(GetWidget(MOZ_GTK_MENUITEM),
++                         "horizontal-padding", horizontal_padding,
++                         nullptr);
  
-@@ -935,7 +1151,7 @@ moz_gtk_button_paint(cairo_t *cr, GdkRec
- 
-     if (state->focused) {
-         GtkBorder border;
--        gtk_style_context_get_border(style, state_flags, &border);
-+        moz_gtk_get_style_border(style, state_flags, &border);
-         x += border.left;
-         y += border.top;
-         width -= (border.left + border.right);
-@@ -956,15 +1172,14 @@ moz_gtk_toggle_paint(cairo_t *cr, GdkRec
-     gint indicator_size, indicator_spacing;
-     gint x, y, width, height;
-     gint focus_x, focus_y, focus_width, focus_height;
--    GtkWidget *w;
--    GtkStyleContext *style;
-+    MozGtkWidget *w;
+     return MOZ_GTK_SUCCESS;
+ }
+@@ -771,10 +497,11 @@ moz_gtk_button_get_default_overflow(gint
+ {
+     GtkBorder* default_outside_border;
  
-     if (isradio) {
-         moz_gtk_radio_get_metrics(&indicator_size, &indicator_spacing);
--        w = gRadiobuttonWidget;
-+        w = &gRadiobutton;
-     } else {
-         moz_gtk_checkbox_get_metrics(&indicator_size, &indicator_spacing);
--        w = gCheckboxWidget;
-+        w = &gCheckbox;
-     }
+-    ensure_button_widget();
+-    gtk_style_context_get_style(gtk_widget_get_style_context(gButtonWidget),
++    GtkStyleContext *style = ClaimStyleContext(MOZ_GTK_BUTTON);
++    gtk_style_context_get_style(style,
+                                 "default-outside-border", &default_outside_border,
+                                 NULL);
++    ReleaseStyleContext(style);
+ 
+     if (default_outside_border) {
+         *border_top = default_outside_border->top;
+@@ -794,10 +521,11 @@ moz_gtk_button_get_default_border(gint*
+ {
+     GtkBorder* default_border;
  
-     // XXX we should assert rect->height >= indicator_size too
-@@ -983,11 +1198,9 @@ moz_gtk_toggle_paint(cairo_t *cr, GdkRec
-     focus_width = width + 2 * indicator_spacing;
-     focus_height = height + 2 * indicator_spacing;
-   
--    style = gtk_widget_get_style_context(w);
+-    ensure_button_widget();
+-    gtk_style_context_get_style(gtk_widget_get_style_context(gButtonWidget),
++    GtkStyleContext *style = ClaimStyleContext(MOZ_GTK_BUTTON);
++    gtk_style_context_get_style(style,
+                                 "default-border", &default_border,
+                                 NULL);
++    ReleaseStyleContext(style);
+ 
+     if (default_border) {
+         *border_top = default_border->top;
+@@ -831,17 +559,15 @@ static gint
+ moz_gtk_window_paint(cairo_t *cr, GdkRectangle* rect,
+                      GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
 -
--    gtk_widget_set_sensitive(w, !state->disabled);
--    gtk_widget_set_direction(w, direction);
--    gtk_style_context_save(style);
-+    gtk_widget_set_sensitive(w->widget, !state->disabled);
-+    gtk_widget_set_direction(w->widget, direction);
-+    gtk_style_context_save(w->check.styleCheck);
+-    ensure_window_widget();
+-    gtk_widget_set_direction(gProtoWindow, direction);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_WINDOW, direction);
  
-     if (selected)
-         state_flags |= checkbox_check_state;
-@@ -995,13 +1208,15 @@ moz_gtk_toggle_paint(cairo_t *cr, GdkRec
-     if (inconsistent)
-         state_flags |= GTK_STATE_FLAG_INCONSISTENT;
+-    style = gtk_widget_get_style_context(gProtoWindow);	
+     gtk_style_context_save(style);
+     gtk_style_context_add_class(style, GTK_STYLE_CLASS_BACKGROUND);
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+     gtk_style_context_restore(style);
  
--    gtk_style_context_set_state(style, state_flags);
-+    gtk_style_context_set_state(w->check.styleCheck, state_flags);
++    ReleaseStyleContext(style);
 +
-+    gtk_render_background(w->check.styleCheck, cr, x, y, width, height);
-+    gtk_render_frame(w->check.styleCheck, cr, x, y, width, height);
- 
-     if (isradio) {
--        gtk_style_context_add_class(style, GTK_STYLE_CLASS_RADIO);
--        gtk_render_option(style, cr, x, y, width, height);
-+        gtk_render_option(w->check.styleCheck, cr, x, y, width, height);
-         if (state->focused) {
--            gtk_render_focus(style, cr, focus_x, focus_y,
-+            gtk_render_focus(w->check.styleCheck, cr, focus_x, focus_y,
-                             focus_width, focus_height);
-         }
-     }
-@@ -1010,15 +1225,14 @@ moz_gtk_toggle_paint(cairo_t *cr, GdkRec
-         * 'indeterminate' type on checkboxes. In GTK, the shadow type
-         * must also be changed for the state to be drawn.
-         */        
--        gtk_style_context_add_class(style, GTK_STYLE_CLASS_CHECK);
--        gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(gCheckboxWidget), inconsistent);
--        gtk_render_check(style, cr, x, y, width, height);        
-+        gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(w->widget), inconsistent);
-+        gtk_render_check(w->check.styleCheck, cr, x, y, width, height);
-         if (state->focused) {
--            gtk_render_focus(style, cr, 
-+            gtk_render_focus(w->check.styleCheck, cr,
-                              focus_x, focus_y, focus_width, focus_height);
-         }
-     }
--    gtk_style_context_restore(style);
-+    gtk_style_context_restore(w->check.styleCheck);
+     return MOZ_GTK_SUCCESS;
+ }
  
+@@ -1118,6 +844,36 @@ moz_gtk_scrollbar_button_paint(cairo_t *
      return MOZ_GTK_SUCCESS;
  }
-@@ -1035,8 +1249,8 @@ calculate_button_inner_rect(GtkWidget* b
-     style = gtk_widget_get_style_context(button);
- 
-     /* This mirrors gtkbutton's child positioning */
--    gtk_style_context_get_border(style, 0, &border);
--    gtk_style_context_get_padding(style, 0, &padding);
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
- 
-     inner_rect->x = rect->x + border.left + padding.left;
-     inner_rect->y = rect->y + padding.top + border.top;
-@@ -1099,9 +1313,9 @@ moz_gtk_scrollbar_button_paint(cairo_t *
-     ensure_scrollbar_widget();
- 
-     if (flags & MOZ_GTK_STEPPER_VERTICAL)
--        scrollbar = gVertScrollbarWidget;
-+        scrollbar = gVertScrollbar.widget;
-     else
--        scrollbar = gHorizScrollbarWidget;
-+        scrollbar = gHorizScrollbar.widget;
- 
-     gtk_widget_set_direction(scrollbar, direction);
- 
-@@ -1181,25 +1395,22 @@ moz_gtk_scrollbar_trough_paint(GtkThemeW
+ 
++static void
++moz_gtk_update_scrollbar_style(GtkStyleContext* style,
++                               WidgetNodeType widget,
++                               GtkTextDirection direction)
++{
++    if (widget == MOZ_GTK_SCROLLBAR_HORIZONTAL) {
++        gtk_style_context_add_class(style, GTK_STYLE_CLASS_BOTTOM);
++    } else {
++        if (direction == GTK_TEXT_DIR_LTR) {
++            gtk_style_context_add_class(style, GTK_STYLE_CLASS_RIGHT);
++            gtk_style_context_remove_class(style, GTK_STYLE_CLASS_LEFT);
++        } else {
++            gtk_style_context_add_class(style, GTK_STYLE_CLASS_LEFT);
++            gtk_style_context_remove_class(style, GTK_STYLE_CLASS_RIGHT);
++        }
++    }
++}
++
++static void
++moz_gtk_draw_styled_frame(GtkStyleContext* style, cairo_t *cr,
++                          GdkRectangle* rect, bool drawFocus)
++{
++    gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
++    gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
++    if (drawFocus) {
++        gtk_render_focus(style, cr,
++                         rect->x, rect->y, rect->width, rect->height);
++    }
++}
++
+ static gint
+ moz_gtk_scrollbar_trough_paint(WidgetNodeType widget,
+                                cairo_t *cr, GdkRectangle* rect,
+@@ -1126,26 +882,34 @@ moz_gtk_scrollbar_trough_paint(WidgetNod
                                 GtkTextDirection direction)
  {
-     GtkStyleContext* style;
--    GtkScrollbar *scrollbar;
- 
-     ensure_scrollbar_widget();
- 
--    if (widget ==  MOZ_GTK_SCROLLBAR_HORIZONTAL)
--        scrollbar = GTK_SCROLLBAR(gHorizScrollbarWidget);
--    else
--        scrollbar = GTK_SCROLLBAR(gVertScrollbarWidget);
--
--    gtk_widget_set_direction(GTK_WIDGET(scrollbar), direction);
--    
      if (flags & MOZ_GTK_TRACK_OPAQUE) {
-         style = gtk_widget_get_style_context(GTK_WIDGET(gProtoWindow));
-         gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+-        GtkStyleContext* style =
+-            gtk_widget_get_style_context(GTK_WIDGET(gProtoWindow));
+-        gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
++        GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_WINDOW, direction);
++        gtk_render_background(style, cr,
++                              rect->x, rect->y, rect->width, rect->height);
++        ReleaseStyleContext(style);
      }
  
--    style = gtk_widget_get_style_context(GTK_WIDGET(scrollbar));
--    gtk_style_context_save(style);
--    gtk_style_context_add_class(style, GTK_STYLE_CLASS_TROUGH);
-+     if (widget == MOZ_GTK_SCROLLBAR_HORIZONTAL) {
-+        gtk_widget_set_direction(GTK_WIDGET(gHorizScrollbar.widget), direction);
-+        style = gHorizScrollbar.scroll.style;
-+    }
-+    else {
-+        gtk_widget_set_direction(GTK_WIDGET(gVertScrollbar.widget), direction);
-+        style = gVertScrollbar.scroll.style;
-+    }
+-    GtkStyleContext* style =
+-        ClaimStyleContext(widget == MOZ_GTK_SCROLLBAR_HORIZONTAL ?
+-                          MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL :
+-                          MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL,
+-                          direction);
+-    // TODO - integate with ClaimStyleContext()?
+-    gtk_style_context_set_direction(style, direction);
++    bool isHorizontal = (widget == MOZ_GTK_SCROLLBAR_HORIZONTAL);
++    GtkStyleContext* style;
  
-     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
-     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
-@@ -1208,7 +1419,6 @@ moz_gtk_scrollbar_trough_paint(GtkThemeW
-         gtk_render_focus(style, cr,
-                          rect->x, rect->y, rect->width, rect->height);
+-    gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+-    gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
++    // Draw all child CSS Nodes for Gtk >= 3.20
++    if (gtk_check_version(3, 20, 0) == nullptr) {
++        style = ClaimStyleContext(widget, direction);
++        moz_gtk_update_scrollbar_style(style, widget, direction);
++        moz_gtk_draw_styled_frame(style, cr, rect, state->focused);
++        ReleaseStyleContext(style);
+ 
+-    if (state->focused) {
+-        gtk_render_focus(style, cr,
+-                         rect->x, rect->y, rect->width, rect->height);
++        style = ClaimStyleContext(isHorizontal ?
++                                  MOZ_GTK_SCROLLBAR_CONTENTS_HORIZONTAL :
++                                  MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL,
++                                  direction);
++        moz_gtk_draw_styled_frame(style, cr, rect, state->focused);
++        ReleaseStyleContext(style);
      }
--    gtk_style_context_restore(style);
-     return MOZ_GTK_SUCCESS;
- }
++    style = ClaimStyleContext(isHorizontal ?
++                              MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL :
++                              MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL,
++                              direction);
++    moz_gtk_draw_styled_frame(style, cr, rect, state->focused);
+     ReleaseStyleContext(style);
  
-@@ -1220,24 +1430,20 @@ moz_gtk_scrollbar_thumb_paint(GtkThemeWi
- {
+     return MOZ_GTK_SUCCESS;
+@@ -1160,12 +924,7 @@ moz_gtk_scrollbar_thumb_paint(WidgetNode
      GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
-     GtkStyleContext* style;
--    GtkScrollbar *scrollbar;
      GtkBorder margin;
  
-     ensure_scrollbar_widget();
- 
--    if (widget == MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL)
--        scrollbar = GTK_SCROLLBAR(gHorizScrollbarWidget);
--    else
--        scrollbar = GTK_SCROLLBAR(gVertScrollbarWidget);
--
--    gtk_widget_set_direction(GTK_WIDGET(scrollbar), direction);
+-    GtkStyleContext* style = ClaimStyleContext(widget, direction);
 -
--    style = gtk_widget_get_style_context(GTK_WIDGET(scrollbar));
--    gtk_style_context_save(style);
-+    if (widget == MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL) {
-+        style = gHorizScrollbar.scroll.styleSlider;
-+        gtk_widget_set_direction(GTK_WIDGET(gHorizScrollbar.widget), direction);
-+    }
-+    else {
-+        style = gVertScrollbar.scroll.styleSlider; 
-+        gtk_widget_set_direction(GTK_WIDGET(gVertScrollbar.widget), direction);
-+    }
- 
--    gtk_style_context_add_class(style, GTK_STYLE_CLASS_SLIDER);
-     gtk_style_context_set_state(style, state_flags);
+-    // TODO - integate those with ClaimStyleContext()?
+-    gtk_style_context_set_state(style, state_flags);
+-    gtk_style_context_set_direction(style, direction);
 -
++    GtkStyleContext* style = ClaimStyleContext(widget, direction, state_flags);
      gtk_style_context_get_margin (style, state_flags, &margin);
  
      gtk_render_slider(style, cr,
-@@ -1248,8 +1454,6 @@ moz_gtk_scrollbar_thumb_paint(GtkThemeWi
-                      (widget == MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL) ?
-                      GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL);
- 
--    gtk_style_context_restore(style);
+@@ -1185,17 +944,10 @@ static gint
+ moz_gtk_spin_paint(cairo_t *cr, GdkRectangle* rect,
+                    GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
 -
-     return MOZ_GTK_SUCCESS;
- }
- 
-@@ -1260,8 +1464,8 @@ moz_gtk_spin_paint(cairo_t *cr, GdkRecta
-     GtkStyleContext* style;
- 
-     ensure_spin_widget();
+-    ensure_spin_widget();
 -    gtk_widget_set_direction(gSpinWidget, direction);
 -    style = gtk_widget_get_style_context(gSpinWidget);
-+    gtk_widget_set_direction(gSpin.widget, direction);
-+    style = gSpin.spin.style;
-     gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_SPINBUTTON);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_SPINBUTTON);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_SPINBUTTON, direction);
      gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
-@@ -1280,11 +1484,10 @@ moz_gtk_spin_updown_paint(cairo_t *cr, G
-     GtkStyleContext* style;
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
+-    gtk_style_context_restore(style);
+-
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
  
-     ensure_spin_widget();
+@@ -1204,21 +956,14 @@ moz_gtk_spin_updown_paint(cairo_t *cr, G
+                           gboolean isDown, GtkWidgetState* state,
+                           GtkTextDirection direction)
+ {
+-    GdkRectangle arrow_rect;
+-    GtkStyleContext* style;
+-
+-    ensure_spin_widget();
 -    style = gtk_widget_get_style_context(gSpinWidget);
-+    style = gSpin.spin.style;
-     gtk_style_context_save(style);
+-    gtk_style_context_save(style);
 -    gtk_style_context_add_class(style, GTK_STYLE_CLASS_SPINBUTTON);
-     gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
+-    gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
 -    gtk_widget_set_direction(gSpinWidget, direction);
-+    gtk_widget_set_direction(gSpin.widget, direction);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_SPINBUTTON, direction,
++                                 GetStateFlagsFromGtkWidgetState(state));
  
      gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
      gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
-@@ -1450,15 +1653,13 @@ moz_gtk_vpaned_paint(cairo_t *cr, GdkRec
- static gint
- moz_gtk_entry_paint(cairo_t *cr, GdkRectangle* rect,
-                     GtkWidgetState* state,
--                    GtkWidget* widget, GtkTextDirection direction)
-+                    MozGtkWidget* w, GtkTextDirection direction)
+ 
+-
+     /* hard code these values */
++    GdkRectangle arrow_rect;
+     arrow_rect.width = 6;
+     arrow_rect.height = 6;
+     arrow_rect.x = rect->x + (rect->width - arrow_rect.width) / 2;
+@@ -1229,7 +974,8 @@ moz_gtk_spin_updown_paint(cairo_t *cr, G
+                     isDown ? ARROW_DOWN : ARROW_UP,
+                     arrow_rect.x, arrow_rect.y,
+                     arrow_rect.width);
+-    gtk_style_context_restore(style);
++
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+@@ -1295,8 +1041,8 @@ moz_gtk_scale_thumb_paint(cairo_t *cr, G
+   gtk_widget_set_direction(widget, direction);
+ 
+   style = gtk_widget_get_style_context(widget);
+-  gtk_style_context_add_class(style, GTK_STYLE_CLASS_SLIDER);
+   gtk_style_context_save(style);
++  gtk_style_context_add_class(style, GTK_STYLE_CLASS_SLIDER);
+   gtk_style_context_set_state(style, state_flags);
+   /* determine the thumb size, and position the thumb in the center in the opposite axis 
+   */
+@@ -1321,20 +1067,12 @@ moz_gtk_gripper_paint(cairo_t *cr, GdkRe
+                       GtkWidgetState* state,
+                       GtkTextDirection direction)
  {
-     gint x = rect->x, y = rect->y, width = rect->width, height = rect->height;
 -    GtkStyleContext* style;
-     int draw_focus_outline_only = state->depressed; // NS_THEME_FOCUS_OUTLINE
-+    GtkStyleContext* style = w->entry.style;
- 
--    gtk_widget_set_direction(widget, direction);
 -
--    style = gtk_widget_get_style_context(widget);
-+    gtk_widget_set_direction(w->widget, direction);
+-    ensure_handlebox_widget();
+-    gtk_widget_set_direction(gHandleBoxWidget, direction);
+-
+-    style = gtk_widget_get_style_context(gHandleBoxWidget);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_GRIP);
+-    gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
+-
++    GtkStyleContext* style =
++            ClaimStyleContext(MOZ_GTK_GRIPPER, direction,
++                              GetStateFlagsFromGtkWidgetState(state));
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
+-    gtk_style_context_restore(style);
+-
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+@@ -1435,6 +1173,38 @@ moz_gtk_entry_paint(cairo_t *cr, GdkRect
+     return MOZ_GTK_SUCCESS;
+ }
+ 
++static gint
++moz_gtk_text_view_paint(cairo_t *cr, GdkRectangle* rect,
++                        GtkWidgetState* state,
++                        GtkTextDirection direction)
++{
++    GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
++
++    GtkStyleContext* style_frame =
++        ClaimStyleContext(MOZ_GTK_SCROLLED_WINDOW, direction, state_flags);
++    gtk_render_frame(style_frame, cr, rect->x, rect->y, rect->width, rect->height);
++
++    GtkBorder border, padding;
++    gtk_style_context_get_border(style_frame, state_flags, &border);
++    gtk_style_context_get_padding(style_frame, state_flags, &padding);
++    ReleaseStyleContext(style_frame);
++
++    GtkStyleContext* style =
++        ClaimStyleContext(MOZ_GTK_TEXT_VIEW, direction, state_flags);
++
++    gint xthickness = border.left + padding.left;
++    gint ythickness = border.top + padding.top;
++
++    gtk_render_background(style, cr,
++                          rect->x + xthickness, rect->y + ythickness,
++                          rect->width - 2 * xthickness,
++                          rect->height - 2 * ythickness);
++
++    ReleaseStyleContext(style);
++
++    return MOZ_GTK_SUCCESS;
++}
++
+ static gint 
+ moz_gtk_treeview_paint(cairo_t *cr, GdkRectangle* rect,
+                        GtkWidgetState* state,
+@@ -1447,18 +1217,13 @@ moz_gtk_treeview_paint(cairo_t *cr, GdkR
+     GtkBorder border;
  
-     if (draw_focus_outline_only) {
-         // Inflate the given 'rect' with the focus outline size.
-@@ -1478,10 +1679,9 @@ moz_gtk_entry_paint(cairo_t *cr, GdkRect
-      * textarea window uses gtk_paint_flat_box when exposed */
+     ensure_tree_view_widget();
+-    ensure_scrolled_window_widget();
+-
+     gtk_widget_set_direction(gTreeViewWidget, direction);
+-    gtk_widget_set_direction(gScrolledWindowWidget, direction);
  
-     /* This gets us a lovely greyish disabledish look */
--    gtk_widget_set_sensitive(widget, !state->disabled);
-+    gtk_widget_set_sensitive(w->widget, !state->disabled);
+     /* only handle disabled and normal states, otherwise the whole background
+      * area will be painted differently with other states */
+     state_flags = state->disabled ? GTK_STATE_FLAG_INSENSITIVE : GTK_STATE_FLAG_NORMAL;
  
-     gtk_style_context_save(style);
--    gtk_style_context_add_class(style, GTK_STYLE_CLASS_ENTRY);
-   
-     /* Now paint the shadow and focus border.
-      * We do like in gtk_entry_draw_frame, we first draw the shadow, a tad
-@@ -1531,7 +1731,7 @@ moz_gtk_treeview_paint(cairo_t *cr, GdkR
-     style = gtk_widget_get_style_context(gScrolledWindowWidget);
-     gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_FRAME);    
--    gtk_style_context_get_border(style, state_flags, &border);
-+    moz_gtk_get_style_border(style, state_flags, &border);
+-    style = gtk_widget_get_style_context(gScrolledWindowWidget);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_FRAME);    
++    style = ClaimStyleContext(MOZ_GTK_SCROLLED_WINDOW, direction);
+     gtk_style_context_get_border(style, state_flags, &border);
      xthickness = border.left;
      ythickness = border.top;    
- 
-@@ -1702,7 +1902,7 @@ moz_gtk_combo_box_paint(cairo_t *cr, Gdk
-         if (direction == GTK_TEXT_DIR_LTR) {
-             GtkBorder padding;
-             GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
--            gtk_style_context_get_padding(style, state_flags, &padding);
-+            moz_gtk_get_style_padding(style, state_flags, &padding);
-             arrow_rect.x -= padding.left;
-         }
-         else
-@@ -1804,29 +2004,27 @@ moz_gtk_container_paint(cairo_t *cr, Gdk
-                         gboolean isradio, GtkTextDirection direction)
+@@ -1473,7 +1238,7 @@ moz_gtk_treeview_paint(cairo_t *cr, GdkR
+                           rect->height - 2 * ythickness);
+     gtk_render_frame(style, cr, 
+                      rect->x, rect->y, rect->width, rect->height); 
+-    gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
+     gtk_style_context_restore(style_tree);
+     return MOZ_GTK_SUCCESS;
+ }
+@@ -1648,20 +1413,9 @@ moz_gtk_arrow_paint(cairo_t *cr, GdkRect
+                     GtkWidgetState* state,
+                     GtkArrowType arrow_type, GtkTextDirection direction)
  {
-     GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
 -    GtkStyleContext* style;
--    GtkWidget *widget;
-+    MozGtkWidget *widget;
- 
-     if (isradio) {
-         ensure_radiobutton_widget();
--        widget = gRadiobuttonWidget;
-+        widget = &gRadiobutton;
-     } else {
-         ensure_checkbox_widget();
--        widget = gCheckboxWidget;
-+        widget = &gCheckbox;
-     }
--    gtk_widget_set_direction(widget, direction);
-+    gtk_widget_set_direction(widget->widget, direction);
+-    GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
+     GdkRectangle arrow_rect;
+     gdouble arrow_angle;
  
--    style = gtk_widget_get_style_context(widget);
+-    ensure_button_arrow_widget();
+-    style = gtk_widget_get_style_context(gButtonArrowWidget);
 -    gtk_style_context_save(style);
 -    gtk_style_context_set_state(style, state_flags);
-+    gtk_style_context_save(widget->check.style);
-+    gtk_style_context_set_state(widget->check.style, state_flags);
-   
-     /* this is for drawing a prelight box */
-     if (state_flags & GTK_STATE_FLAG_PRELIGHT) {
--        gtk_render_background(style, cr,
-+        gtk_render_background(widget->check.style, cr,
-                               rect->x, rect->y, rect->width, rect->height);
+-    gtk_widget_set_direction(gButtonArrowWidget, direction);
+-
+-    calculate_arrow_rect(gButtonArrowWidget, rect, &arrow_rect,
+-                         direction);
+-
+     if (direction == GTK_TEXT_DIR_RTL) {
+         arrow_type = (arrow_type == GTK_ARROW_LEFT) ?
+                          GTK_ARROW_RIGHT : GTK_ARROW_LEFT;
+@@ -1680,10 +1434,17 @@ moz_gtk_arrow_paint(cairo_t *cr, GdkRect
+         arrow_angle = ARROW_UP;
+         break;
      }
-   
+-    if (arrow_type != GTK_ARROW_NONE)
+-        gtk_render_arrow(style, cr, arrow_angle,
+-                         arrow_rect.x, arrow_rect.y, arrow_rect.width);                    
 -    gtk_style_context_restore(style);
-+    gtk_style_context_restore(widget->check.style);
-   
++    if (arrow_type == GTK_ARROW_NONE)
++        return MOZ_GTK_SUCCESS;
++
++    calculate_arrow_rect(GetWidget(MOZ_GTK_BUTTON_ARROW), rect, &arrow_rect,
++                         direction);
++    GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_BUTTON_ARROW,
++                                               direction, state_flags);
++    gtk_render_arrow(style, cr, arrow_angle,
++                     arrow_rect.x, arrow_rect.y, arrow_rect.width);
++    ReleaseStyleContext(style);
      return MOZ_GTK_SUCCESS;
  }
-@@ -1836,32 +2034,26 @@ moz_gtk_toggle_label_paint(cairo_t *cr,
-                            GtkWidgetState* state, 
-                            gboolean isradio, GtkTextDirection direction)
- {
--    GtkStyleContext *style;
--    GtkWidget *widget;
-+    MozGtkWidget *widget;
- 
-     if (!state->focused)
-         return MOZ_GTK_SUCCESS;
  
-     if (isradio) {
-         ensure_radiobutton_widget();
--        widget = gRadiobuttonWidget;
-+        widget = &gRadiobutton;
-     } else {
-         ensure_checkbox_widget();
--        widget = gCheckboxWidget;
--    }
--    style = gtk_widget_get_style_context(widget);
+@@ -1776,19 +1537,10 @@ static gint
+ moz_gtk_toolbar_paint(cairo_t *cr, GdkRectangle* rect,
+                       GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
+-
+-    ensure_toolbar_widget();
+-    gtk_widget_set_direction(gToolbarWidget, direction);
+-
+-    style = gtk_widget_get_style_context(gToolbarWidget);
 -    gtk_style_context_save(style);
--    if (isradio) {
--      gtk_style_context_add_class(style, GTK_STYLE_CLASS_RADIO);
--    } else {
--      gtk_style_context_add_class(style, GTK_STYLE_CLASS_CHECK);
-+        widget = &gCheckbox;
-     }
--    gtk_widget_set_direction(widget, direction);
-+    gtk_style_context_save(widget->check.styleLabel);
-+    gtk_widget_set_direction(widget->widget, direction);
- 
--    gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
--    gtk_render_focus(style, cr,
-+    gtk_style_context_set_state(widget->check.styleLabel, 
-+                                GetStateFlagsFromGtkWidgetState(state));
-+    gtk_render_focus(widget->check.styleLabel, cr,
-                     rect->x, rect->y, rect->width, rect->height);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_TOOLBAR);
+-
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_TOOLBAR, direction);
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
 -    gtk_style_context_restore(style);
-+    gtk_style_context_restore(widget->check.styleLabel);
+-
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
  
+@@ -1798,7 +1550,6 @@ static gint
+ moz_gtk_toolbar_separator_paint(cairo_t *cr, GdkRectangle* rect,
+                                 GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
+     gint     separator_width;
+     gint     paint_width;
+     gboolean wide_separators;
+@@ -1807,16 +1558,14 @@ moz_gtk_toolbar_separator_paint(cairo_t
+     const double start_fraction = 0.2;
+     const double end_fraction = 0.8;
+ 
+-    ensure_toolbar_separator_widget();
+-    gtk_widget_set_direction(gToolbarSeparatorWidget, direction);
+-
+-    style = gtk_widget_get_style_context(gToolbarSeparatorWidget);
+-
+-    gtk_style_context_get_style(gtk_widget_get_style_context(gToolbarWidget),
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_TOOLBAR);
++    gtk_style_context_get_style(style,
+                                 "wide-separators", &wide_separators,
+                                 "separator-width", &separator_width,
+                                 NULL);
++    ReleaseStyleContext(style);
+ 
++    style = ClaimStyleContext(MOZ_GTK_TOOLBAR_SEPARATOR, direction);
+     if (wide_separators) {
+         if (separator_width > rect->width)
+             separator_width = rect->width;
+@@ -1840,7 +1589,7 @@ moz_gtk_toolbar_separator_paint(cairo_t
+                         rect->x + (rect->width - paint_width) / 2,
+                         rect->y + rect->height * end_fraction);
+     }
+-
++    ReleaseStyleContext(style);
      return MOZ_GTK_SUCCESS;
  }
-@@ -1922,7 +2114,7 @@ moz_gtk_toolbar_separator_paint(cairo_t
-                           rect->height * (end_fraction - start_fraction));
-     } else {
-         GtkBorder padding;
--        gtk_style_context_get_padding(style, 0, &padding);
-+        gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
-     
-         paint_width = padding.left;
-         if (paint_width > rect->width)
-@@ -1945,9 +2137,9 @@ moz_gtk_tooltip_paint(cairo_t *cr, GdkRe
-     GtkStyleContext* style;
  
-     ensure_tooltip_widget();
+@@ -1848,14 +1597,10 @@ static gint
+ moz_gtk_tooltip_paint(cairo_t *cr, GdkRectangle* rect,
+                       GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
+-
+-    ensure_tooltip_widget();
 -    gtk_widget_set_direction(gTooltipWidget, direction);
-+    gtk_widget_set_direction(gTooltip.widget, direction);
- 
+-
 -    style = gtk_widget_get_style_context(gTooltipWidget);
-+    style = gTooltip.tooltip.style;
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_TOOLTIP, direction);
      gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
      gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
++    ReleaseStyleContext(style);
      return MOZ_GTK_SUCCESS;
-@@ -2006,18 +2198,13 @@ static gint
+ }
+ 
+@@ -1870,14 +1615,11 @@ moz_gtk_resizer_paint(cairo_t *cr, GdkRe
+     // GTK_STYLE_CLASS_VIEW to match the background with textarea elements.
+     // The resizer is drawn with shaded variants of the background color, and
+     // so a transparent background would lead to a transparent resizer.
+-    ensure_text_view_widget();
+-    gtk_widget_set_direction(gTextViewWidget, GTK_TEXT_DIR_LTR);
+-
+-    style = gtk_widget_get_style_context(gTextViewWidget);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_VIEW);
++    style = ClaimStyleContext(MOZ_GTK_TEXT_VIEW, GTK_TEXT_DIR_LTR,
++                              GetStateFlagsFromGtkWidgetState(state));
++    // TODO - we need to save/restore style when gtk 3.20 CSS node path
++    // is used
+     gtk_style_context_add_class(style, GTK_STYLE_CLASS_GRIP);
+-    gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
+ 
+     // Workaround unico not respecting the text direction for resizers.
+     // See bug 1174248.
+@@ -1891,7 +1633,7 @@ moz_gtk_resizer_paint(cairo_t *cr, GdkRe
+ 
+     gtk_render_handle(style, cr, rect->x, rect->y, rect->width, rect->height);
+     cairo_restore(cr);
+-    gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
+ 
+     return MOZ_GTK_SUCCESS;
+ }
+@@ -1900,16 +1642,9 @@ static gint
+ moz_gtk_frame_paint(cairo_t *cr, GdkRectangle* rect,
+                     GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
+-
+-    ensure_frame_widget();
+-    gtk_widget_set_direction(gFrameWidget, direction);
+-    style = gtk_widget_get_style_context(gFrameWidget);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_FRAME);
+-
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_FRAME, direction);
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
+-    gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+@@ -1917,18 +1652,11 @@ static gint
  moz_gtk_progressbar_paint(cairo_t *cr, GdkRectangle* rect,
                            GtkTextDirection direction)
  {
 -    GtkStyleContext* style;
 -
-     ensure_progress_widget();
+-    ensure_progress_widget();
 -    gtk_widget_set_direction(gProgressWidget, direction);
-+    gtk_widget_set_direction(gProgressBar.widget, direction);
- 
+-
 -    style = gtk_widget_get_style_context(gProgressWidget);
 -    gtk_style_context_save(style);
 -    gtk_style_context_add_class(style, GTK_STYLE_CLASS_TROUGH);
 -    
--    gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
--    gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_PROGRESS_TROUGH,
++                                               direction);
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
 -    gtk_style_context_restore(style);
-+    gtk_render_background(gProgressBar.progress.styleTrough, cr,
-+                          rect->x, rect->y, rect->width, rect->height);
-+    gtk_render_frame(gProgressBar.progress.styleTrough, cr,
-+                     rect->x, rect->y, rect->width, rect->height);
++    ReleaseStyleContext(style);
  
      return MOZ_GTK_SUCCESS;
  }
-@@ -2027,15 +2214,8 @@ moz_gtk_progress_chunk_paint(cairo_t *cr
-                              GtkTextDirection direction,
-                              GtkThemeWidgetType widget)
+@@ -1940,13 +1668,15 @@ moz_gtk_progress_chunk_paint(cairo_t *cr
  {
--    GtkStyleContext* style;
--
-     ensure_progress_widget();
+     GtkStyleContext* style;
+ 
+-    ensure_progress_widget();
 -    gtk_widget_set_direction(gProgressWidget, direction);
 -
 -    style = gtk_widget_get_style_context(gProgressWidget);
 -    gtk_style_context_save(style);
 -    gtk_style_context_remove_class(style, GTK_STYLE_CLASS_TROUGH);
 -    gtk_style_context_add_class(style, GTK_STYLE_CLASS_PROGRESSBAR);
-+    gtk_widget_set_direction(gProgressBar.widget, direction);
++    if (gtk_check_version(3, 20, 0) != nullptr) {
++      /* Ask for MOZ_GTK_PROGRESS_TROUGH instead of MOZ_GTK_PROGRESSBAR
++       * because ClaimStyleContext() saves/restores that style */
++      style = ClaimStyleContext(MOZ_GTK_PROGRESS_TROUGH, direction);
++      gtk_style_context_remove_class(style, GTK_STYLE_CLASS_TROUGH);
++      gtk_style_context_add_class(style, GTK_STYLE_CLASS_PROGRESSBAR);
++    } else {
++      style = ClaimStyleContext(MOZ_GTK_PROGRESS_CHUNK, direction);
++    }
  
      if (widget == MOZ_GTK_PROGRESS_CHUNK_INDETERMINATE ||
          widget == MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE) {
-@@ -2074,12 +2254,14 @@ moz_gtk_progress_chunk_paint(cairo_t *cr
-     // gtk_render_activity was used to render progress chunks on GTK versions
-     // before 3.13.7, see bug 1173907.
-     if (!gtk_check_version(3, 13, 7)) {
--      gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
--      gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
-+      gtk_render_background(gProgressBar.progress.styleProgress, cr,
-+                            rect->x, rect->y, rect->width, rect->height);
-+      gtk_render_frame(gProgressBar.progress.styleProgress, cr,
-+                       rect->x, rect->y, rect->width, rect->height);
+@@ -1990,7 +1720,7 @@ moz_gtk_progress_chunk_paint(cairo_t *cr
      } else {
--      gtk_render_activity(style, cr, rect->x, rect->y, rect->width, rect->height);
-+      gtk_render_activity(gProgressBar.progress.styleProgress, cr,
-+                          rect->x, rect->y, rect->width, rect->height);
+       gtk_render_activity(style, cr, rect->x, rect->y, rect->width, rect->height);
      }
 -    gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
  
      return MOZ_GTK_SUCCESS;
  }
-@@ -2096,7 +2278,7 @@ moz_gtk_get_tab_thickness(void)
+@@ -2324,10 +2054,10 @@ moz_gtk_menu_bar_paint(cairo_t *cr, GdkR
+ {
+     GtkStyleContext* style;
+ 
+-    ensure_menu_bar_widget();
+-    gtk_widget_set_direction(gMenuBarWidget, direction);
++    GtkWidget* widget = GetWidget(MOZ_GTK_MENUBAR);
++    gtk_widget_set_direction(widget, direction);
  
-     style = gtk_widget_get_style_context(gTabWidget);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_NOTEBOOK);
--    gtk_style_context_get_border(style, 0, &border);
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
+-    style = gtk_widget_get_style_context(gMenuBarWidget);
++    style = gtk_widget_get_style_context(widget);
+     gtk_style_context_save(style);
+     gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUBAR);
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height);
+@@ -2343,14 +2073,14 @@ moz_gtk_menu_popup_paint(cairo_t *cr, Gd
+ {
+     GtkStyleContext* style;
  
-     if (border.top < 2)
-         return 2; /* some themes don't set ythickness correctly */
-@@ -2292,7 +2474,7 @@ moz_gtk_tab_paint(cairo_t *cr, GdkRectan
-       gtk_style_context_save(style);
-       moz_gtk_tab_prepare_style_context(style, flags);
+-    ensure_menu_popup_widget();
+-    gtk_widget_set_direction(gMenuPopupWidget, direction);
++    GtkWidget* widget = GetWidget(MOZ_GTK_MENUPOPUP);
++    gtk_widget_set_direction(widget, direction);
  
--      gtk_style_context_get_padding(style, GetStateFlagsFromGtkWidgetState(state), &padding);
-+      moz_gtk_get_style_padding(style, GetStateFlagsFromGtkWidgetState(state), &padding);
+     // Draw a backing toplevel. This fixes themes that don't provide a menu
+     // background, and depend on the GtkMenu's implementation window to provide it.
+     moz_gtk_window_paint(cr, rect, direction);
  
-       focusRect.x += padding.left;
-       focusRect.width -= (padding.left + padding.right);
-@@ -2408,7 +2590,7 @@ moz_gtk_tab_scroll_arrow_paint(cairo_t *
- }
+-    style = gtk_widget_get_style_context(gMenuPopupWidget);
++    style = gtk_widget_get_style_context(widget);
+     gtk_style_context_save(style);
+     gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENU);
  
- static gint
--moz_gtk_menu_bar_paint(cairo_t *cr, GdkRectangle* rect,
-+moz_gtk_menu_bar_paint(cairo_t *cr, GdkRectangle* rect, GtkWidgetState* state,
-                        GtkTextDirection direction)
- {
-     GtkStyleContext* style;
-@@ -2468,7 +2650,7 @@ moz_gtk_menu_separator_paint(cairo_t *cr
-     border_width = gtk_container_get_border_width(GTK_CONTAINER(gMenuSeparatorWidget));
+@@ -2373,12 +2103,10 @@ moz_gtk_menu_separator_paint(cairo_t *cr
+     gint x, y, w;
+     GtkBorder padding;
  
-     style = gtk_widget_get_style_context(gMenuSeparatorWidget);
--    gtk_style_context_get_padding(style, 0, &padding);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
+-    ensure_menu_separator_widget();
+-    gtk_widget_set_direction(gMenuSeparatorWidget, direction);
+-
+-    border_width = gtk_container_get_border_width(GTK_CONTAINER(gMenuSeparatorWidget));
+-
+-    style = gtk_widget_get_style_context(gMenuSeparatorWidget);
++    border_width =
++        gtk_container_get_border_width(GTK_CONTAINER(
++                                       GetWidget(MOZ_GTK_MENUSEPARATOR)));
++    style = ClaimStyleContext(MOZ_GTK_MENUSEPARATOR, direction);
+     gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
  
      x = rect->x + border_width;
-     y = rect->y + border_width;
-@@ -2521,7 +2703,8 @@ moz_gtk_menu_item_paint(cairo_t *cr, Gdk
-             item_widget = gMenuItemWidget;
-         }
-         style = gtk_widget_get_style_context(item_widget);
+@@ -2408,42 +2136,36 @@ moz_gtk_menu_separator_paint(cairo_t *cr
+     }
+ 
+     gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
+ 
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+ // See gtk_menu_item_draw() for reference.
+ static gint
+-moz_gtk_menu_item_paint(cairo_t *cr, GdkRectangle* rect,
+-                        GtkWidgetState* state,
+-                        gint flags, GtkTextDirection direction)
++moz_gtk_menu_item_paint(WidgetNodeType widget, cairo_t *cr, GdkRectangle* rect,
++                        GtkWidgetState* state, GtkTextDirection direction)
+ {
+-    GtkStyleContext* style;
+-    GtkWidget* item_widget;
+-    guint border_width;
+     gint x, y, w, h;
+ 
+     if (state->inHover && !state->disabled) {   
+-        if (flags & MOZ_TOPLEVEL_MENU_ITEM) {
+-            ensure_menu_bar_item_widget();
+-            item_widget = gMenuBarItemWidget;
+-        } else {
+-            ensure_menu_item_widget();
+-            item_widget = gMenuItemWidget;
+-        }
+-        style = gtk_widget_get_style_context(item_widget);
 -        gtk_style_context_save(style);
-+// TODO - FIX!
-+//        gtk_style_context_save(style);
++        guint border_width =
++            gtk_container_get_border_width(GTK_CONTAINER(GetWidget(widget)));
++        GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
++        GtkStyleContext* style =
++            ClaimStyleContext(widget, direction, state_flags);
+ 
+-        if (flags & MOZ_TOPLEVEL_MENU_ITEM) {
+-            gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUBAR);
++        bool pre_3_6 = gtk_check_version(3, 6, 0) != nullptr;
++        if (pre_3_6) {
++            // GTK+ 3.4 saves the style context and adds the menubar class to
++            // menubar children, but does each of these only when drawing, not
++            // during layout.
++            gtk_style_context_save(style);
++            if (widget == MOZ_GTK_MENUBARITEM) {
++                gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUBAR);
++            }
+         }
  
-         if (flags & MOZ_TOPLEVEL_MENU_ITEM) {
-             gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUBAR);
-@@ -2540,7 +2723,7 @@ moz_gtk_menu_item_paint(cairo_t *cr, Gdk
+-        gtk_widget_set_direction(item_widget, direction);
+-        gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUITEM);
+-        gtk_style_context_set_state(style, GetStateFlagsFromGtkWidgetState(state));
+-
+-        border_width = gtk_container_get_border_width(GTK_CONTAINER(item_widget));
+-
+         x = rect->x + border_width;
+         y = rect->y + border_width;
+         w = rect->width - border_width * 2;
+@@ -2451,7 +2173,11 @@ moz_gtk_menu_item_paint(cairo_t *cr, Gdk
  
          gtk_render_background(style, cr, x, y, w, h);
          gtk_render_frame(style, cr, x, y, w, h);
 -        gtk_style_context_restore(style);
-+//        gtk_style_context_restore(style);
++
++        if (pre_3_6) {
++            gtk_style_context_restore(style);
++        }
++        ReleaseStyleContext(style);
      }
  
      return MOZ_GTK_SUCCESS;
-@@ -2556,7 +2739,10 @@ moz_gtk_menu_arrow_paint(cairo_t *cr, Gd
- 
-     ensure_menu_item_widget();
-     gtk_widget_set_direction(gMenuItemWidget, direction);
--
-+/*
-+    state_flags |= (direction == GTK_TEXT_DIR_LTR) ? GTK_STATE_FLAG_DIR_LTR :
-+                                                     GTK_STATE_FLAG_DIR_RTL;
-+*/
-     style = gtk_widget_get_style_context(gMenuItemWidget);
-     gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUITEM);
-@@ -2606,7 +2792,7 @@ moz_gtk_check_menu_item_paint(cairo_t *c
-     }
-     
-     gtk_style_context_set_state(style, state_flags);
--    gtk_style_context_get_padding(style, state_flags, &padding);
-+    moz_gtk_get_style_padding(style, state_flags, &padding);
- 
-     offset = gtk_container_get_border_width(GTK_CONTAINER(gCheckMenuItemWidget)) +
-                                             padding.left + 2;
-@@ -2658,7 +2844,7 @@ moz_gtk_add_style_border(GtkStyleContext
+@@ -2462,21 +2188,13 @@ moz_gtk_menu_arrow_paint(cairo_t *cr, Gd
+                          GtkWidgetState* state,
+                          GtkTextDirection direction)
  {
-     GtkBorder border;
+-    GtkStyleContext* style;
+     GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
+-
+-    ensure_menu_item_widget();
+-    gtk_widget_set_direction(gMenuItemWidget, direction);
+-
+-    style = gtk_widget_get_style_context(gMenuItemWidget);
+-    gtk_style_context_save(style);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_MENUITEM);
+-    gtk_style_context_set_state(style, state_flags);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_MENUITEM,
++                                               direction, state_flags);
+     gtk_render_arrow(style, cr,
+                     (direction == GTK_TEXT_DIR_LTR) ? ARROW_RIGHT : ARROW_LEFT,
+                     rect->x, rect->y, rect->width);
+-    gtk_style_context_restore(style);
+-
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
  
--    gtk_style_context_get_border(style, 0, &border);
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
+@@ -2494,7 +2212,7 @@ moz_gtk_check_menu_item_paint(cairo_t *c
+     gint indicator_size, horizontal_padding;
+     gint x, y;
  
-     *left += border.left;
-     *right += border.right;
-@@ -2667,12 +2853,22 @@ moz_gtk_add_style_border(GtkStyleContext
- }
+-    moz_gtk_menu_item_paint(cr, rect, state, FALSE, direction);
++    moz_gtk_menu_item_paint(MOZ_GTK_MENUITEM, cr, rect, state, direction);
  
- static void
-+moz_gtk_get_style_border(GtkStyleContext* style, GtkStateFlags state_flags,
-+                         GtkBorder *border)
-+{
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, state_flags);
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), border);
-+    gtk_style_context_restore(style);
-+}
-+
-+static void
- moz_gtk_add_style_padding(GtkStyleContext* style,
-                           gint* left, gint* top, gint* right, gint* bottom)
+     ensure_check_menu_item_widget();
+     gtk_widget_set_direction(gCheckMenuItemWidget, direction);
+@@ -2545,21 +2263,13 @@ static gint
+ moz_gtk_info_bar_paint(cairo_t *cr, GdkRectangle* rect,
+                        GtkWidgetState* state)
  {
-     GtkBorder padding;
- 
--    gtk_style_context_get_padding(style, 0, &padding);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
+-    GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state);
+-    GtkStyleContext *style;
+-    ensure_info_bar();
+-
+-    style = gtk_widget_get_style_context(gInfoBar);
+-    gtk_style_context_save(style);
+-
+-    gtk_style_context_set_state(style, state_flags);
+-    gtk_style_context_add_class(style, GTK_STYLE_CLASS_INFO);
+-
++    GtkStyleContext *style =
++        ClaimStyleContext(MOZ_GTK_INFO_BAR, GTK_TEXT_DIR_LTR,
++                          GetStateFlagsFromGtkWidgetState(state));
+     gtk_render_background(style, cr, rect->x, rect->y, rect->width,
+                           rect->height);
+     gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height);
+-
+-    gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
  
-     *left += padding.left;
-     *right += padding.right;
-@@ -2680,6 +2876,16 @@ moz_gtk_add_style_padding(GtkStyleContex
-     *bottom += padding.bottom;
+     return MOZ_GTK_SUCCESS;
  }
- 
-+static void
-+moz_gtk_get_style_padding(GtkStyleContext* style, GtkStateFlags state_flags,
-+                          GtkBorder *padding)
-+{
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, state_flags);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), padding);
-+    gtk_style_context_restore(style);
-+}
-+
- gint
- moz_gtk_get_widget_border(GtkThemeWidgetType widget, gint* left, gint* top,
-                           gint* right, gint* bottom, GtkTextDirection direction,
-@@ -2694,37 +2900,35 @@ moz_gtk_get_widget_border(GtkThemeWidget
+@@ -2605,18 +2315,18 @@ moz_gtk_get_widget_border(WidgetNodeType
+     case MOZ_GTK_BUTTON:
      case MOZ_GTK_TOOLBAR_BUTTON:
          {
-             ensure_button_widget();
+-            ensure_button_widget();
 -            style = gtk_widget_get_style_context(gButtonWidget);
--
++            style = ClaimStyleContext(MOZ_GTK_BUTTON);
+ 
 -            *left = *top = *right = *bottom = gtk_container_get_border_width(GTK_CONTAINER(gButtonWidget));
++            *left = *top = *right = *bottom =
++                gtk_container_get_border_width(GTK_CONTAINER(GetWidget(MOZ_GTK_BUTTON)));
  
--            if (widget == MOZ_GTK_TOOLBAR_BUTTON) {
--                gtk_style_context_save(style);
--                gtk_style_context_add_class(style, "image-button");
--            }
+             if (widget == MOZ_GTK_TOOLBAR_BUTTON) {
+                 gtk_style_context_save(style);
+                 gtk_style_context_add_class(style, "image-button");
+             }
 -              
--            moz_gtk_add_style_padding(style, left, top, right, bottom);
++
+             moz_gtk_add_style_padding(style, left, top, right, bottom);
 -                
--            if (widget == MOZ_GTK_TOOLBAR_BUTTON)
--                gtk_style_context_restore(style);
-+            *left = *top = *right = *bottom = gtk_container_get_border_width(GTK_CONTAINER(gButton.widget));
-+            moz_gtk_add_style_padding(gButton.button.style, left, top, right, bottom);
++
+             if (widget == MOZ_GTK_TOOLBAR_BUTTON)
+                 gtk_style_context_restore(style);
  
-             // XXX: Subtract 1 pixel from the border to account for the added
+@@ -2624,12 +2334,13 @@ moz_gtk_get_widget_border(WidgetNodeType
              // -moz-focus-inner border (Bug 1228281).
              *left -= 1; *top -= 1; *right -= 1; *bottom -= 1;
--            moz_gtk_add_style_border(style, left, top, right, bottom);
-+            moz_gtk_add_style_border(gButton.button.style, left, top, right, bottom);
+             moz_gtk_add_style_border(style, left, top, right, bottom);
 +
++            ReleaseStyleContext(style);
              return MOZ_GTK_SUCCESS;
          }
      case MOZ_GTK_ENTRY:
          {
-             ensure_entry_widget();
+-            ensure_entry_widget();
 -            style = gtk_widget_get_style_context(gEntryWidget);
++            style = ClaimStyleContext(MOZ_GTK_ENTRY);
  
              // XXX: Subtract 1 pixel from the padding to account for the default
              // padding in forms.css. See bug 1187385.
-             *left = *top = *right = *bottom = -1;
--            moz_gtk_add_style_padding(style, left, top, right, bottom);
--            moz_gtk_add_style_border(style, left, top, right, bottom);
+@@ -2637,16 +2348,15 @@ moz_gtk_get_widget_border(WidgetNodeType
+             moz_gtk_add_style_padding(style, left, top, right, bottom);
+             moz_gtk_add_style_border(style, left, top, right, bottom);
  
-+            moz_gtk_add_style_padding(gEntry.entry.style, left, top, right, bottom);
-+            moz_gtk_add_style_border(gEntry.entry.style, left, top, right, bottom);
-+
-+            return MOZ_GTK_SUCCESS;
-+        }
-+    case MOZ_GTK_TOOLTIP:
-+        {
-+            ensure_tooltip_widget();
-+            moz_gtk_add_style_padding(gTooltip.tooltip.style, left, top, right, bottom);
-+            moz_gtk_add_style_border(gTooltip.tooltip.style, left, top, right, bottom);
++            ReleaseStyleContext(style);
              return MOZ_GTK_SUCCESS;
          }
++    case MOZ_GTK_TEXT_VIEW:
      case MOZ_GTK_TREEVIEW:
-@@ -2759,7 +2963,7 @@ moz_gtk_get_widget_border(GtkThemeWidget
-         break;
-     case MOZ_GTK_DROPDOWN_ENTRY:
-         ensure_combo_box_entry_widgets();
--        w = gComboBoxEntryTextareaWidget;
-+        w = gComboBoxEntryTextarea.widget;
-         break;
-     case MOZ_GTK_DROPDOWN_ARROW:
-         ensure_combo_box_entry_widgets();
-@@ -2795,7 +2999,7 @@ moz_gtk_get_widget_border(GtkThemeWidget
- 
-                 if (!wide_separators) {
-                     style = gtk_widget_get_style_context(gComboBoxSeparatorWidget);
--                    gtk_style_context_get_border(style, 0, &border);
-+                    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
-                     separator_width = border.left;
-                 }
-             }
-@@ -2814,14 +3018,17 @@ moz_gtk_get_widget_border(GtkThemeWidget
+         {
+-            ensure_scrolled_window_widget();
+-            style = gtk_widget_get_style_context(gScrolledWindowWidget);
+-            gtk_style_context_save(style);
+-            gtk_style_context_add_class(style, GTK_STYLE_CLASS_FRAME);
++            style = ClaimStyleContext(MOZ_GTK_SCROLLED_WINDOW);
+             moz_gtk_add_style_border(style, left, top, right, bottom);
+-            gtk_style_context_restore(style);
++            ReleaseStyleContext(style);
+             return MOZ_GTK_SUCCESS;
+         }
+     case MOZ_GTK_TREE_HEADER_CELL:
+@@ -2726,14 +2436,12 @@ moz_gtk_get_widget_border(WidgetNodeType
          w = gTabWidget;
          break;
      case MOZ_GTK_PROGRESSBAR:
 -        ensure_progress_widget();
 -        w = gProgressWidget;
--        break;
-+        {
-+            ensure_progress_widget();
-+            moz_gtk_add_style_border(gProgressBar.progress.styleTrough,
-+                                     left, top, right, bottom);
-+            return MOZ_GTK_SUCCESS;
-+        }
++        w = GetWidget(MOZ_GTK_PROGRESSBAR);
+         break;
      case MOZ_GTK_SPINBUTTON_ENTRY:
      case MOZ_GTK_SPINBUTTON_UP:
      case MOZ_GTK_SPINBUTTON_DOWN:
-         ensure_spin_widget();
+-        ensure_spin_widget();
 -        w = gSpinWidget;
-+        w = gSpin.widget;
++        w = GetWidget(MOZ_GTK_SPINBUTTON);
          break;
      case MOZ_GTK_SCALE_HORIZONTAL:
          ensure_scale_widget();
-@@ -2840,12 +3047,13 @@ moz_gtk_get_widget_border(GtkThemeWidget
+@@ -2744,8 +2452,7 @@ moz_gtk_get_widget_border(WidgetNodeType
+         w = gVScaleWidget;
+         break;
+     case MOZ_GTK_FRAME:
+-        ensure_frame_widget();
+-        w = gFrameWidget;
++        w = GetWidget(MOZ_GTK_FRAME);
+         break;
+     case MOZ_GTK_CHECKBUTTON_CONTAINER:
+     case MOZ_GTK_RADIOBUTTON_CONTAINER:
+@@ -2761,19 +2468,17 @@ moz_gtk_get_widget_border(WidgetNodeType
+             return MOZ_GTK_SUCCESS;
+         }
+     case MOZ_GTK_MENUPOPUP:
+-        ensure_menu_popup_widget();
+-        w = gMenuPopupWidget;
++        w = GetWidget(MOZ_GTK_MENUPOPUP);
+         break;
++    case MOZ_GTK_MENUBARITEM:
+     case MOZ_GTK_MENUITEM:
+     case MOZ_GTK_CHECKMENUITEM:
+     case MOZ_GTK_RADIOMENUITEM:
          {
-             if (widget == MOZ_GTK_CHECKBUTTON_CONTAINER) {
-                 ensure_checkbox_widget();
--                w = gCheckboxWidget;
-+                w = gCheckbox.widget;
-+                style = gCheckbox.check.styleCheck;
-             } else {
-                 ensure_radiobutton_widget();
--                w = gRadiobuttonWidget;
-+                w = gRadiobutton.widget;
-+                style = gRadiobutton.check.styleCheck;
+-            if (widget == MOZ_GTK_MENUITEM) {
+-                ensure_menu_item_widget();
+-                ensure_menu_bar_item_widget();
+-                w = gMenuItemWidget;
+-            }
+-            else {
++            if (widget == MOZ_GTK_MENUBARITEM || widget == MOZ_GTK_MENUITEM) {
++                // Bug 1274143 for MOZ_GTK_MENUBARITEM
++                w = GetWidget(MOZ_GTK_MENUITEM);
++            } else {
+                 ensure_check_menu_item_widget();
+                 w = gCheckMenuItemWidget;
              }
--            style = gtk_widget_get_style_context(w);
- 
-             *left = *top = *right = *bottom = gtk_container_get_border_width(GTK_CONTAINER(w));
-             moz_gtk_add_style_border(style,
-@@ -2904,7 +3112,6 @@ moz_gtk_get_widget_border(GtkThemeWidget
+@@ -2784,9 +2489,16 @@ moz_gtk_get_widget_border(WidgetNodeType
+             return MOZ_GTK_SUCCESS;
+         }
+     case MOZ_GTK_INFO_BAR:
+-        ensure_info_bar();
+-        w = gInfoBar;
++        w = GetWidget(MOZ_GTK_INFO_BAR);
+         break;
++    case MOZ_GTK_TOOLTIP:
++        {
++            style = ClaimStyleContext(MOZ_GTK_TOOLTIP);
++            moz_gtk_add_style_border(style, left, top, right, bottom);
++            moz_gtk_add_style_padding(style, left, top, right, bottom);
++            ReleaseStyleContext(style);
++            return MOZ_GTK_SUCCESS;
++        }
+     /* These widgets have no borders, since they are not containers. */
+     case MOZ_GTK_CHECKBUTTON_LABEL:
+     case MOZ_GTK_RADIOBUTTON_LABEL:
+@@ -2810,7 +2522,6 @@ moz_gtk_get_widget_border(WidgetNodeType
      case MOZ_GTK_MENUSEPARATOR:
      /* These widgets have no borders.*/
      case MOZ_GTK_SPINBUTTON:
@@ -1161,403 +1322,352 @@ diff -up firefox-47.0/widget/gtk/gtk3drawing.c.gtk3-20 firefox-47.0/widget/gtk/g
      case MOZ_GTK_WINDOW:
      case MOZ_GTK_RESIZER:
      case MOZ_GTK_MENUARROW:
-@@ -2978,6 +3185,32 @@ moz_gtk_get_combo_box_entry_button_size(
- }
+@@ -2908,8 +2619,7 @@ moz_gtk_get_arrow_size(WidgetNodeType wi
+             widget = gComboBoxArrowWidget;
+             break;
+         default:
+-            ensure_button_arrow_widget();
+-            widget = gButtonArrowWidget;
++            widget = GetWidget(MOZ_GTK_BUTTON_ARROW);
+             break;
+     }
  
- gint
-+moz_gtk_get_entry_height(gint* height)
-+{
-+    GtkRequisition requisition;
-+    ensure_entry_widget();
-+
-+    gtk_widget_get_preferred_size(gEntry.widget, NULL, &requisition);
-+    *height = requisition.height;
-+
-+    return MOZ_GTK_SUCCESS;
-+}
-+
-+
-+gint
-+moz_gtk_get_button_height(gint* height)
-+{
-+    GtkRequisition requisition;
-+    ensure_entry_widget();
-+
-+    gtk_widget_get_preferred_size(gButton.widget, NULL, &requisition);
-+    *height = requisition.height;
-+
-+    return MOZ_GTK_SUCCESS;
-+}
-+
-+
-+gint
- moz_gtk_get_tab_scroll_arrow_size(gint* width, gint* height)
+@@ -2924,11 +2634,9 @@ moz_gtk_get_toolbar_separator_width(gint
  {
-     gint arrow_size;
-@@ -3030,7 +3263,7 @@ moz_gtk_get_toolbar_separator_width(gint
-                          "separator-width", &separator_width,
-                          NULL);
+     gboolean wide_separators;
+     gint separator_width;
+-    GtkStyleContext* style;
+     GtkBorder border;
+ 
+-    ensure_toolbar_widget();
+-    style = gtk_widget_get_style_context(gToolbarWidget);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_TOOLBAR);
+     gtk_style_context_get_style(style,
+                                 "space-size", size,
+                                 "wide-separators",  &wide_separators,
+@@ -2937,17 +2645,18 @@ moz_gtk_get_toolbar_separator_width(gint
      /* Just in case... */
--    gtk_style_context_get_border(style, 0, &border);
-+    gtk_style_context_get_border(style, gtk_style_context_get_state(style), &border);
+     gtk_style_context_get_border(style, GTK_STATE_FLAG_NORMAL, &border);
      *size = MAX(*size, (wide_separators ? separator_width : border.left));
++    ReleaseStyleContext(style);
+     return MOZ_GTK_SUCCESS;
+ }
+ 
+ gint
+ moz_gtk_get_expander_size(gint* size)
+ {
+-    ensure_expander_widget();
+-    gtk_style_context_get_style(gtk_widget_get_style_context(gExpanderWidget),
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_EXPANDER);
++    gtk_style_context_get_style(style,
+                                 "expander-size", size,
+                                 NULL);
+-
++    ReleaseStyleContext(style);
      return MOZ_GTK_SUCCESS;
  }
-@@ -3072,7 +3305,7 @@ moz_gtk_get_menu_separator_height(gint *
-     border_width = gtk_container_get_border_width(GTK_CONTAINER(gMenuSeparatorWidget));
  
-     style = gtk_widget_get_style_context(gMenuSeparatorWidget);
--    gtk_style_context_get_padding(style, 0, &padding);
-+    gtk_style_context_get_padding(style, gtk_style_context_get_state(style), &padding);
+@@ -2972,11 +2681,11 @@ moz_gtk_get_menu_separator_height(gint *
+     GtkStyleContext* style;
+     guint border_width;
+ 
+-    ensure_menu_separator_widget();
+-
+-    border_width = gtk_container_get_border_width(GTK_CONTAINER(gMenuSeparatorWidget));
++    border_width =
++        gtk_container_get_border_width(GTK_CONTAINER(
++                                       GetWidget(MOZ_GTK_MENUSEPARATOR)));
+ 
+-    style = gtk_widget_get_style_context(gMenuSeparatorWidget);
++    style = ClaimStyleContext(MOZ_GTK_MENUSEPARATOR);
+     gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
  
      gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_SEPARATOR);
-@@ -3130,15 +3363,21 @@ moz_gtk_get_scrollbar_metrics(MozGtkScro
- {
-     ensure_scrollbar_widget();
- 
--    gtk_widget_style_get (gHorizScrollbarWidget,
-+    gtk_widget_style_get (gHorizScrollbar.widget,
-                           "slider_width", &metrics->slider_width,
-                           "trough_border", &metrics->trough_border,
-                           "stepper_size", &metrics->stepper_size,
-                           "stepper_spacing", &metrics->stepper_spacing,
-                           NULL);
- 
--    metrics->min_slider_size = 
--        gtk_range_get_min_slider_size(GTK_RANGE(gHorizScrollbarWidget));
-+    if (!gtk_check_version(3,19,7)) {
-+        gtk_style_context_get(gVertScrollbar.scroll.styleSlider, 
-+                              gtk_style_context_get_state(gVertScrollbar.scroll.styleSlider), 
-+                              "min-height", &metrics->min_slider_size, NULL);
-+    } else {
-+        metrics->min_slider_size = 
-+            gtk_range_get_min_slider_size(GTK_RANGE(gVertScrollbar.widget));
-+    }
+@@ -2988,6 +2697,7 @@ moz_gtk_get_menu_separator_height(gint *
+                                 NULL);
  
-     return MOZ_GTK_SUCCESS;
+     gtk_style_context_restore(style);
++    ReleaseStyleContext(style);
+ 
+     *size = padding.top + padding.bottom + border_width*2;
+     *size += (wide_separators) ? separator_height : 1;
+@@ -2998,8 +2708,7 @@ moz_gtk_get_menu_separator_height(gint *
+ void
+ moz_gtk_get_entry_min_height(gint* height)
+ {
+-    ensure_entry_widget();
+-    GtkStyleContext* style = gtk_widget_get_style_context(gEntryWidget);
++    GtkStyleContext* style = ClaimStyleContext(MOZ_GTK_ENTRY);
+     if (!gtk_check_version(3, 20, 0)) {
+         gtk_style_context_get(style, gtk_style_context_get_state(style),
+                               "min-height", height,
+@@ -3014,6 +2723,7 @@ moz_gtk_get_entry_min_height(gint* heigh
+     gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
+ 
+     *height += (border.top + border.bottom + padding.top + padding.bottom);
++    ReleaseStyleContext(style);
  }
-@@ -3163,7 +3402,7 @@ moz_gtk_images_in_buttons()
+ 
+ void
+@@ -3094,8 +2804,7 @@ moz_gtk_images_in_buttons()
+     gboolean result;
      GtkSettings* settings;
  
-     ensure_button_widget();
+-    ensure_button_widget();
 -    settings = gtk_widget_get_settings(gButtonWidget);
-+    settings = gtk_widget_get_settings(gButton.widget);
++    settings = gtk_widget_get_settings(GetWidget(MOZ_GTK_BUTTON));
  
      g_object_get(settings, "gtk-button-images", &result, NULL);
      return result;
-@@ -3191,7 +3430,7 @@ moz_gtk_widget_paint(GtkThemeWidgetType
+@@ -3116,14 +2825,14 @@ moz_gtk_widget_paint(WidgetNodeType widg
+     case MOZ_GTK_BUTTON:
+     case MOZ_GTK_TOOLBAR_BUTTON:
+         if (state->depressed) {
+-            ensure_toggle_button_widget();
+             return moz_gtk_button_paint(cr, rect, state,
+                                         (GtkReliefStyle) flags,
+-                                        gToggleButtonWidget, direction);
++                                        GetWidget(MOZ_GTK_TOGGLE_BUTTON),
++                                        direction);
          }
-         ensure_button_widget();
+-        ensure_button_widget();
          return moz_gtk_button_paint(cr, rect, state,
 -                                    (GtkReliefStyle) flags, gButtonWidget,
-+                                    (GtkReliefStyle) flags, gButton.widget,
++                                    (GtkReliefStyle) flags,
++                                    GetWidget(MOZ_GTK_BUTTON),
                                      direction);
          break;
      case MOZ_GTK_CHECKBUTTON:
-@@ -3241,7 +3480,7 @@ moz_gtk_widget_paint(GtkThemeWidgetType
+@@ -3171,9 +2880,9 @@ moz_gtk_widget_paint(WidgetNodeType widg
+                                          state, direction);
+         break;
      case MOZ_GTK_SPINBUTTON_ENTRY:
-         ensure_spin_widget();
+-        ensure_spin_widget();
++        // TODO - use MOZ_GTK_SPINBUTTON_ENTRY style directly
          return moz_gtk_entry_paint(cr, rect, state,
 -                                   gSpinWidget, direction);
-+                                   &gSpin, direction);
++                                   GetWidget(MOZ_GTK_SPINBUTTON), direction);
          break;
      case MOZ_GTK_GRIPPER:
          return moz_gtk_gripper_paint(cr, rect, state,
-@@ -3268,7 +3507,7 @@ moz_gtk_widget_paint(GtkThemeWidgetType
+@@ -3198,9 +2907,11 @@ moz_gtk_widget_paint(WidgetNodeType widg
+                                                (GtkExpanderStyle) flags, direction);
+         break;
      case MOZ_GTK_ENTRY:
-         ensure_entry_widget();
-         return moz_gtk_entry_paint(cr, rect, state,
+-        ensure_entry_widget();
+-        return moz_gtk_entry_paint(cr, rect, state,
 -                                   gEntryWidget, direction);
-+                                   &gEntry, direction);
++        return moz_gtk_entry_paint(cr, rect, state, GetWidget(MOZ_GTK_ENTRY),
++                                   direction);
++        break;
++    case MOZ_GTK_TEXT_VIEW:
++        return moz_gtk_text_view_paint(cr, rect, state, direction);
          break;
      case MOZ_GTK_DROPDOWN:
          return moz_gtk_combo_box_paint(cr, rect, state, direction);
-@@ -3280,7 +3519,7 @@ moz_gtk_widget_paint(GtkThemeWidgetType
-     case MOZ_GTK_DROPDOWN_ENTRY:
-         ensure_combo_box_entry_widgets();
-         return moz_gtk_entry_paint(cr, rect, state,
--                                   gComboBoxEntryTextareaWidget, direction);
-+                                   &gComboBoxEntryTextarea, direction);
+@@ -3271,9 +2982,9 @@ moz_gtk_widget_paint(WidgetNodeType widg
+         return moz_gtk_menu_separator_paint(cr, rect,
+                                             direction);
          break;
-     case MOZ_GTK_CHECKBUTTON_CONTAINER:
-     case MOZ_GTK_RADIOBUTTON_CONTAINER:
-@@ -3332,7 +3571,7 @@ moz_gtk_widget_paint(GtkThemeWidgetType
-                                               (GtkArrowType) flags, direction);
++    case MOZ_GTK_MENUBARITEM:
+     case MOZ_GTK_MENUITEM:
+-        return moz_gtk_menu_item_paint(cr, rect, state, flags,
+-                                       direction);
++        return moz_gtk_menu_item_paint(widget, cr, rect, state, direction);
          break;
-     case MOZ_GTK_MENUBAR:
--        return moz_gtk_menu_bar_paint(cr, rect, direction);
-+        return moz_gtk_menu_bar_paint(cr, rect, state, direction);
-         break;
-     case MOZ_GTK_MENUPOPUP:
-         return moz_gtk_menu_popup_paint(cr, rect, direction);
-@@ -3383,7 +3622,7 @@ GtkWidget* moz_gtk_get_scrollbar_widget(
- {
-     MOZ_ASSERT(is_initialized, "Forgot to call moz_gtk_init()");
-     ensure_scrollbar_widget();
--    return gHorizScrollbarWidget;
-+    return gVertScrollbar.widget;
- }
- 
- gboolean moz_gtk_has_scrollbar_buttons(void)
-@@ -3391,7 +3630,7 @@ gboolean moz_gtk_has_scrollbar_buttons(v
-     gboolean backward, forward, secondary_backward, secondary_forward;
-     MOZ_ASSERT(is_initialized, "Forgot to call moz_gtk_init()");
-     ensure_scrollbar_widget();
--    gtk_widget_style_get (gHorizScrollbarWidget,
-+    gtk_widget_style_get (gHorizScrollbar.widget,
-                           "has-backward-stepper", &backward,
-                           "has-forward-stepper", &forward,
-                           "has-secondary-backward-stepper", &secondary_backward,
-@@ -3403,8 +3642,8 @@ gboolean moz_gtk_has_scrollbar_buttons(v
+     case MOZ_GTK_MENUARROW:
+         return moz_gtk_menu_arrow_paint(cr, rect, state,
+@@ -3333,25 +3044,16 @@ gboolean moz_gtk_has_scrollbar_buttons(v
  gint
  moz_gtk_shutdown()
  {
 -    if (gTooltipWidget)
 -        gtk_widget_destroy(gTooltipWidget);
-+    moz_gtk_widget_free(&gTooltip);
-+
      /* This will destroy all of our widgets */
-     if (gProtoWindow)
-         gtk_widget_destroy(gProtoWindow);
-@@ -3415,17 +3654,19 @@ moz_gtk_shutdown()
+-
+     ResetWidgetCache();
+ 
+     /* TODO - replace it with appropriate widget */
+     if (gTreeHeaderSortArrowWidget)
+         gtk_widget_destroy(gTreeHeaderSortArrowWidget);
  
-     gProtoWindow = NULL;
+-    gProtoWindow = NULL;
      gProtoLayout = NULL;
 -    gButtonWidget = NULL;
-+
-+    // MozWidgets
-+    moz_gtk_widget_free(&gButton);
-     gToggleButtonWidget = NULL;
-     gButtonArrowWidget = NULL;
--    gCheckboxWidget = NULL;
--    gRadiobuttonWidget = NULL;
--    gHorizScrollbarWidget = NULL;
--    gVertScrollbarWidget = NULL;
+-    gToggleButtonWidget = NULL;
+-    gButtonArrowWidget = NULL;
 -    gSpinWidget = NULL;
-+    moz_gtk_widget_free(&gCheckbox);
-+    moz_gtk_widget_free(&gRadiobutton);
-+    moz_gtk_widget_free(&gHorizScrollbar);
-+    moz_gtk_widget_free(&gVertScrollbar);
-+    moz_gtk_widget_free(&gSpin);
      gHScaleWidget = NULL;
      gVScaleWidget = NULL;
 -    gEntryWidget = NULL;
-+    moz_gtk_widget_free(&gEntry);
      gComboBoxWidget = NULL;
      gComboBoxButtonWidget = NULL;
      gComboBoxSeparatorWidget = NULL;
-@@ -3433,14 +3674,13 @@ moz_gtk_shutdown()
-     gComboBoxEntryWidget = NULL;
+@@ -3360,29 +3062,15 @@ moz_gtk_shutdown()
      gComboBoxEntryButtonWidget = NULL;
      gComboBoxEntryArrowWidget = NULL;
--    gComboBoxEntryTextareaWidget = NULL;
-+    moz_gtk_widget_free(&gComboBoxEntryTextarea);
-     gHandleBoxWidget = NULL;
-     gToolbarWidget = NULL;
-     gStatusbarWidget = NULL;
-     gFrameWidget = NULL;
+     gComboBoxEntryTextareaWidget = NULL;
+-    gHandleBoxWidget = NULL;
+-    gToolbarWidget = NULL;
+-    gFrameWidget = NULL;
 -    gProgressWidget = NULL;
-+    moz_gtk_widget_free(&gProgressBar);
      gTabWidget = NULL;
+-    gTextViewWidget = nullptr;
 -    gTooltipWidget = NULL;
-     gMenuBarWidget = NULL;
-     gMenuBarItemWidget = NULL;
-     gMenuPopupWidget = NULL;
-diff -up firefox-47.0/widget/gtk/gtkdrawing.h.gtk3-20 firefox-47.0/widget/gtk/gtkdrawing.h
---- firefox-47.0/widget/gtk/gtkdrawing.h.gtk3-20	2016-05-12 19:13:34.000000000 +0200
-+++ firefox-47.0/widget/gtk/gtkdrawing.h	2016-06-23 10:21:37.072462099 +0200
-@@ -67,6 +67,13 @@ typedef enum {
+-    gMenuBarWidget = NULL;
+-    gMenuBarItemWidget = NULL;
+-    gMenuPopupWidget = NULL;
+-    gMenuItemWidget = NULL;
+     gImageMenuItemWidget = NULL;
+     gCheckMenuItemWidget = NULL;
+     gTreeViewWidget = NULL;
+     gMiddleTreeViewColumn = NULL;
+     gTreeHeaderCellWidget = NULL;
+     gTreeHeaderSortArrowWidget = NULL;
+-    gExpanderWidget = NULL;
+-    gToolbarSeparatorWidget = NULL;
+-    gMenuSeparatorWidget = NULL;
+     gHPanedWidget = NULL;
+     gVPanedWidget = NULL;
+-    gScrolledWindowWidget = NULL;
+ 
+     is_initialized = FALSE;
+ 
+diff -up firefox-48.0/widget/gtk/gtkdrawing.h.gtk3-20 firefox-48.0/widget/gtk/gtkdrawing.h
+--- firefox-48.0/widget/gtk/gtkdrawing.h.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/gtkdrawing.h	2016-07-29 09:15:11.822285857 +0200
+@@ -69,12 +69,6 @@ typedef enum {
    MOZ_GTK_TAB_SELECTED        = 1 << 10
  } GtkTabFlags;
  
-+typedef struct {
-+  GType type;
-+  const gchar *name;
-+  const gchar *class1;
-+  const gchar *class2;
-+} GtkCssNode;
-+
- /** flags for menuitems **/
- typedef enum {
-   /* menuitem is part of the menubar */
-@@ -396,6 +403,9 @@ void
- moz_gtk_get_arrow_size(GtkThemeWidgetType widgetType,
-                        gint* width, gint* height);
- 
-+gint moz_gtk_get_entry_height(gint* height);
-+gint moz_gtk_get_button_height(gint* height);
-+
- /**
-  * Get the desired size of a toolbar separator
-  * size:    [OUT] the desired width
-@@ -466,6 +476,12 @@ gboolean moz_gtk_images_in_buttons(void)
-  */
- gboolean moz_gtk_has_scrollbar_buttons(void);
- 
-+
-+GtkStyleContext *
-+moz_gtk_style_create(GtkCssNode *node, GtkStyleContext *parent);
-+
-+
-+
- #ifdef __cplusplus
- }
- #endif /* __cplusplus */
-diff -up firefox-47.0/widget/gtk/mozgtk/mozgtk.c.gtk3-20 firefox-47.0/widget/gtk/mozgtk/mozgtk.c
---- firefox-47.0/widget/gtk/mozgtk/mozgtk.c.gtk3-20	2016-05-12 19:13:34.000000000 +0200
-+++ firefox-47.0/widget/gtk/mozgtk/mozgtk.c	2016-06-23 10:26:36.495774041 +0200
-@@ -504,9 +504,15 @@ STUB(gtk_window_set_type_hint)
- STUB(gtk_window_set_wmclass)
- STUB(gtk_window_unfullscreen)
- STUB(gtk_window_unmaximize)
-+STUB(gtk_widget_get_preferred_height_and_baseline_for_width)
-+STUB(gtk_entry_get_text_area)
-+STUB(gtk_check_menu_item_get_type)
-+STUB(gtk_spin_button_get_type)
-+STUB(gtk_button_get_type)
- #endif
- 
- #ifdef GTK3_SYMBOLS
+-/** flags for menuitems **/
+-typedef enum {
+-  /* menuitem is part of the menubar */
+-  MOZ_TOPLEVEL_MENU_ITEM      = 1 << 0
+-} GtkMenuItemFlags;
+-
+ /* function type for moz_gtk_enable_style_props */
+ typedef gint (*style_prop_t)(GtkStyle*, const gchar*, gint);
+ 
+@@ -93,6 +87,10 @@ typedef enum {
+   MOZ_GTK_BUTTON,
+   /* Paints a button with image and no text */
+   MOZ_GTK_TOOLBAR_BUTTON,
++  /* Paints a toggle button */
++  MOZ_GTK_TOGGLE_BUTTON,
++  /* Paints a button arrow */
++  MOZ_GTK_BUTTON_ARROW,
+ 
+   /* Paints the container part of a GtkCheckButton. */
+   MOZ_GTK_CHECKBUTTON_CONTAINER,
+@@ -115,6 +113,7 @@ typedef enum {
+ 
+   /* Horizontal GtkScrollbar counterparts */
+   MOZ_GTK_SCROLLBAR_HORIZONTAL,
++  MOZ_GTK_SCROLLBAR_CONTENTS_HORIZONTAL,
+   /* Paints the trough (track) of a GtkScrollbar. */
+   MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL,
+   /* Paints the slider (thumb) of a GtkScrollbar. */
+@@ -122,6 +121,7 @@ typedef enum {
+ 
+   /* Vertical GtkScrollbar counterparts */
+   MOZ_GTK_SCROLLBAR_VERTICAL,
++  MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL,
+   MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL,
+   MOZ_GTK_SCROLLBAR_THUMB_VERTICAL,
+ 
+@@ -140,6 +140,10 @@ typedef enum {
+   MOZ_GTK_GRIPPER,
+   /* Paints a GtkEntry. */
+   MOZ_GTK_ENTRY,
++  /* Paints a GtkExpander. */
++  MOZ_GTK_EXPANDER,
++  /* Paints a GtkTextView. */
++  MOZ_GTK_TEXT_VIEW,
+   /* Paints a GtkOptionMenu. */
+   MOZ_GTK_DROPDOWN,
+   /* Paints a dropdown arrow (a GtkButton containing a down GtkArrow). */
+@@ -159,6 +163,8 @@ typedef enum {
+   MOZ_GTK_RESIZER,
+   /* Paints a GtkProgressBar. */
+   MOZ_GTK_PROGRESSBAR,
++  /* Paints a trough (track) of a GtkProgressBar */
++  MOZ_GTK_PROGRESS_TROUGH,
+   /* Paints a progress chunk of a GtkProgressBar. */
+   MOZ_GTK_PROGRESS_CHUNK,
+   /* Paints a progress chunk of an indeterminated GtkProgressBar. */
+@@ -187,7 +193,9 @@ typedef enum {
+   MOZ_GTK_MENUARROW,
+   /* Paints an arrow in a toolbar button. flags is a GtkArrowType. */
+   MOZ_GTK_TOOLBARBUTTON_ARROW,
+-  /* Paints items of menubar and popups. */
++  /* Paints items of menubar. */
++  MOZ_GTK_MENUBARITEM,
++  /* Paints items of popup menus. */
+   MOZ_GTK_MENUITEM,
+   MOZ_GTK_CHECKMENUITEM,
+   MOZ_GTK_RADIOMENUITEM,
+@@ -202,6 +210,8 @@ typedef enum {
+   MOZ_GTK_WINDOW_CONTAINER,
+   /* Paints a GtkInfoBar, for notifications. */
+   MOZ_GTK_INFO_BAR,
++  /* Used for scrolled window shell. */
++  MOZ_GTK_SCROLLED_WINDOW,
+ 
+   MOZ_GTK_WIDGET_NODE_COUNT
+ } WidgetNodeType;
+diff -up firefox-48.0/widget/gtk/mozgtk/mozgtk.c.gtk3-20 firefox-48.0/widget/gtk/mozgtk/mozgtk.c
+--- firefox-48.0/widget/gtk/mozgtk/mozgtk.c.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/mozgtk/mozgtk.c	2016-07-29 09:15:11.823285862 +0200
+@@ -517,6 +517,7 @@ STUB(gdk_event_get_source_device)
+ STUB(gdk_window_get_type)
+ STUB(gdk_x11_window_get_xid)
+ STUB(gdk_x11_display_get_type)
 +STUB(gtk_box_new)
- STUB(gdk_device_get_source)
- STUB(gdk_device_manager_get_client_pointer)
- STUB(gdk_disable_multidevice)
-@@ -581,6 +587,15 @@ STUB(gtk_color_chooser_get_type)
+ STUB(gtk_cairo_should_draw_window)
+ STUB(gtk_cairo_transform_to_window)
+ STUB(gtk_combo_box_text_append)
+@@ -570,6 +571,7 @@ STUB(gtk_tree_view_column_get_button)
+ STUB(gtk_widget_get_preferred_size)
+ STUB(gtk_widget_get_state_flags)
+ STUB(gtk_widget_get_style_context)
++STUB(gtk_widget_path_append_for_widget)
+ STUB(gtk_widget_path_append_type)
+ STUB(gtk_widget_path_copy)
+ STUB(gtk_widget_path_free)
+@@ -587,6 +589,10 @@ STUB(gtk_color_chooser_get_type)
  STUB(gtk_color_chooser_set_rgba)
  STUB(gtk_color_chooser_get_rgba)
  STUB(gtk_color_chooser_set_use_alpha)
-+STUB(gtk_style_context_get_path)
-+STUB(gtk_widget_path_append_for_widget)
-+STUB(gtk_widget_path_copy)
-+STUB(gtk_widget_path_iter_set_object_name)
-+STUB(gtk_widget_path_iter_add_class)
-+STUB(gtk_widget_path_iter_get_state)
-+STUB(gtk_style_context_set_parent)
-+STUB(gtk_widget_path_unref)
++STUB(gtk_check_menu_item_new)
++STUB(gtk_style_context_get_direction)
++STUB(gtk_style_context_invalidate)
 +STUB(gtk_tooltip_get_type)
  #endif
  
  #ifdef GTK2_SYMBOLS
-diff -up firefox-47.0/widget/gtk/nsLookAndFeel.cpp.gtk3-20 firefox-47.0/widget/gtk/nsLookAndFeel.cpp
---- firefox-47.0/widget/gtk/nsLookAndFeel.cpp.gtk3-20	2016-06-01 06:11:44.000000000 +0200
-+++ firefox-47.0/widget/gtk/nsLookAndFeel.cpp	2016-06-23 10:21:37.073462100 +0200
-@@ -353,14 +353,18 @@ nsLookAndFeel::NativeGetColor(ColorID aI
-     case eColorID_activeborder:
-         // active window border
-         gtk_style_context_get_border_color(mBackgroundStyle, 
--                                           GTK_STATE_FLAG_NORMAL, &gdk_color);
-+                                           gtk_style_context_get_state(mBackgroundStyle), 
-+                                           &gdk_color);
-         aColor = GDK_RGBA_TO_NS_RGBA(gdk_color);
-         break;
-     case eColorID_inactiveborder:
-         // inactive window border
-+        gtk_style_context_save(mBackgroundStyle);
-+        gtk_style_context_set_state(mBackgroundStyle, GTK_STATE_FLAG_INSENSITIVE);
-         gtk_style_context_get_border_color(mBackgroundStyle, 
--                                           GTK_STATE_FLAG_INSENSITIVE, 
-+                                           gtk_style_context_get_state(mBackgroundStyle), 
-                                            &gdk_color);
-+        gtk_style_context_restore(mBackgroundStyle);
-         aColor = GDK_RGBA_TO_NS_RGBA(gdk_color);
-         break;
-     case eColorID_graytext: // disabled text in windows, menus, etc.
-@@ -369,9 +373,12 @@ nsLookAndFeel::NativeGetColor(ColorID aI
-         break;
-     case eColorID_inactivecaption:
-         // inactive window caption
-+        gtk_style_context_save(mBackgroundStyle);
-+        gtk_style_context_set_state(mBackgroundStyle, GTK_STATE_FLAG_INSENSITIVE);
-         gtk_style_context_get_background_color(mBackgroundStyle, 
--                                               GTK_STATE_FLAG_INSENSITIVE, 
-+                                               gtk_style_context_get_state(mBackgroundStyle), 
-                                                &gdk_color);
-+        gtk_style_context_restore(mBackgroundStyle);
-         aColor = GDK_RGBA_TO_NS_RGBA(gdk_color);
-         break;
- #endif
-@@ -497,13 +504,17 @@ nsLookAndFeel::NativeGetColor(ColorID aI
-     case eColorID__moz_buttondefault:
-       // default button border color
-         gtk_style_context_get_border_color(mButtonStyle, 
--                                           GTK_STATE_FLAG_NORMAL, &gdk_color);
-+                                           gtk_style_context_get_state(mButtonStyle),
-+                                           &gdk_color);
-         aColor = GDK_RGBA_TO_NS_RGBA(gdk_color);
-         break;
-     case eColorID__moz_buttonhoverface:
-+        gtk_style_context_save(mButtonStyle);
-+        gtk_style_context_set_state(mButtonStyle, GTK_STATE_FLAG_PRELIGHT);
-         gtk_style_context_get_background_color(mButtonStyle, 
--                                               GTK_STATE_FLAG_PRELIGHT, 
-+                                               gtk_style_context_get_state(mButtonStyle), 
-                                                &gdk_color);
-+        gtk_style_context_restore(mButtonStyle);
-         aColor = GDK_RGBA_TO_NS_RGBA(gdk_color);
-         break;
-     case eColorID__moz_buttonhovertext:
-@@ -1019,6 +1030,29 @@ create_context(GtkWidgetPath *path)
- }
+diff -up firefox-48.0/widget/gtk/nsLookAndFeel.cpp.gtk3-20 firefox-48.0/widget/gtk/nsLookAndFeel.cpp
+--- firefox-48.0/widget/gtk/nsLookAndFeel.cpp.gtk3-20	2016-06-01 06:11:44.000000000 +0200
++++ firefox-48.0/widget/gtk/nsLookAndFeel.cpp	2016-07-29 09:15:54.943459700 +0200
+@@ -31,6 +31,7 @@
+ 
+ #if MOZ_WIDGET_GTK != 2
+ #include <cairo-gobject.h>
++#include "WidgetStyleCache.h"
  #endif
  
-+GtkStyleContext*
-+CreateStyleForWidget(GtkWidget* aWidget, GtkStyleContext* aParentStyle)
-+{   
-+  GtkWidgetPath* path =
-+    gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle));
-+
-+  // Work around https://bugzilla.gnome.org/show_bug.cgi?id=767312
-+  // which exists in GTK+ 3.20.
-+  gtk_widget_get_style_context(aWidget);
-+
-+  gtk_widget_path_append_for_widget(path, aWidget);
-+  // Release any floating reference on aWidget.
-+  g_object_ref_sink(aWidget);
-+  g_object_unref(aWidget);
-+    
-+  GtkStyleContext *context = gtk_style_context_new();
-+  gtk_style_context_set_path(context, path);
-+  gtk_style_context_set_parent(context, aParentStyle);
-+  gtk_widget_path_unref(path);
-+    
-+  return context;
-+}
-+
- void
- nsLookAndFeel::Init()
- {
-@@ -1122,26 +1156,36 @@ nsLookAndFeel::Init()
-     style = create_context(path);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_SCROLLBAR);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_TROUGH);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
-     sMozScrollbar = GDK_RGBA_TO_NS_RGBA(color);
-     g_object_unref(style);
- 
-     // Window colors
-     style = create_context(path);
--    gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_BACKGROUND);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
-     sMozWindowBackground = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
+ using mozilla::LookAndFeel;
+@@ -1135,15 +1136,24 @@ nsLookAndFeel::Init()
+     gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
      sMozWindowText = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_restore(style);
+     gtk_style_context_restore(style);
 +    g_object_unref(style);
  
      // tooltip foreground and background
 -    gtk_style_context_add_class(style, GTK_STYLE_CLASS_TOOLTIP);
 -    gtk_style_context_add_class(style, GTK_STYLE_CLASS_BACKGROUND);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    GtkCssNode tooltipPath[] = { 
-+         { GTK_TYPE_TOOLTIP, "tooltip", "background", NULL},
-+    };
-+    style = moz_gtk_style_create(tooltipPath, NULL);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
++    style = ClaimStyleContext(MOZ_GTK_TOOLTIP);
+     gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
      sInfoBackground = GDK_RGBA_TO_NS_RGBA(color);
 -    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
 +    {
@@ -1571,166 +1681,653 @@ diff -up firefox-47.0/widget/gtk/nsLookAndFeel.cpp.gtk3-20 firefox-47.0/widget/g
 +        g_object_unref(boxStyle);
 +    }
      sInfoText = GDK_RGBA_TO_NS_RGBA(color);
-     g_object_unref(style);
+-    g_object_unref(style);
++    ReleaseStyleContext(style);
+ 
+     // menu foreground & menu background
+     GtkWidget *accel_label = gtk_accel_label_new("M");
+diff -up firefox-48.0/widget/gtk/nsNativeThemeGTK.cpp.gtk3-20 firefox-48.0/widget/gtk/nsNativeThemeGTK.cpp
+--- firefox-48.0/widget/gtk/nsNativeThemeGTK.cpp.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/nsNativeThemeGTK.cpp	2016-07-29 09:15:11.824285865 +0200
+@@ -354,10 +354,8 @@ nsNativeThemeGTK::GetGtkWidgetAndState(u
+ 
+           if (isTopLevel) {
+             aState->inHover = menuFrame->IsOpen();
+-            *aWidgetFlags |= MOZ_TOPLEVEL_MENU_ITEM;
+           } else {
+             aState->inHover = CheckBooleanAttr(aFrame, nsGkAtoms::menuactive);
+-            *aWidgetFlags &= ~MOZ_TOPLEVEL_MENU_ITEM;
+           }
+ 
+           aState->active = FALSE;
+@@ -510,8 +508,14 @@ nsNativeThemeGTK::GetGtkWidgetAndState(u
+     break;
+   case NS_THEME_NUMBER_INPUT:
+   case NS_THEME_TEXTFIELD:
++    aGtkWidgetType = MOZ_GTK_ENTRY;
++    break;
+   case NS_THEME_TEXTFIELD_MULTILINE:
++#if (MOZ_WIDGET_GTK == 3)
++    aGtkWidgetType = MOZ_GTK_TEXT_VIEW;
++#else
+     aGtkWidgetType = MOZ_GTK_ENTRY;
++#endif
+     break;
+   case NS_THEME_LISTBOX:
+   case NS_THEME_TREEVIEW:
+@@ -673,6 +677,13 @@ nsNativeThemeGTK::GetGtkWidgetAndState(u
+     aGtkWidgetType = MOZ_GTK_MENUPOPUP;
+     break;
+   case NS_THEME_MENUITEM:
++    {
++      nsMenuFrame *menuFrame = do_QueryFrame(aFrame);
++      if (menuFrame && menuFrame->IsOnMenuBar()) {
++        aGtkWidgetType = MOZ_GTK_MENUBARITEM;
++        break;
++      }
++    }
+     aGtkWidgetType = MOZ_GTK_MENUITEM;
+     break;
+   case NS_THEME_MENUSEPARATOR:
+diff -up firefox-48.0/widget/gtk/WidgetStyleCache.cpp.gtk3-20 firefox-48.0/widget/gtk/WidgetStyleCache.cpp
+--- firefox-48.0/widget/gtk/WidgetStyleCache.cpp.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/WidgetStyleCache.cpp	2016-07-29 09:15:11.825285869 +0200
+@@ -22,7 +22,7 @@ static bool sStyleContextNeedsRestore;
+ static GtkStyleContext* sCurrentStyleContext;
+ #endif
+ static GtkStyleContext*
+-GetStyleInternal(WidgetNodeType aNodeType);
++GetCssNodeStyleInternal(WidgetNodeType aNodeType);
+ 
+ static GtkWidget*
+ CreateWindowWidget()
+@@ -67,12 +67,175 @@ CreateCheckboxWidget()
+ static GtkWidget*
+ CreateRadiobuttonWidget()
+ {
+-  GtkWidget* widget = gtk_radio_button_new_with_label(NULL, "M");
++  GtkWidget* widget = gtk_radio_button_new_with_label(nullptr, "M");
+   AddToWindowContainer(widget);
+   return widget;
+ }
  
-@@ -1156,20 +1200,26 @@ nsLookAndFeel::Init()
-     gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
+ static GtkWidget*
++CreateMenuBarWidget()
++{
++  GtkWidget* widget = gtk_menu_bar_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateMenuPopupWidget()
++{
++  GtkWidget* widget = gtk_menu_new();
++  gtk_menu_attach_to_widget(GTK_MENU(widget), GetWidget(MOZ_GTK_WINDOW),
++                            nullptr);
++  return widget;
++}
++
++static GtkWidget*
++CreateMenuItemWidget(WidgetNodeType aShellType)
++{
++  GtkWidget* widget = gtk_menu_item_new();
++  gtk_menu_shell_append(GTK_MENU_SHELL(GetWidget(aShellType)), widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateProgressWidget()
++{
++  GtkWidget* widget = gtk_progress_bar_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateTooltipWidget()
++{
++  MOZ_ASSERT(gtk_check_version(3, 20, 0) != nullptr,
++             "CreateTooltipWidget should be used for Gtk < 3.20 only.");
++  GtkWidget* widget = CreateWindowWidget();
++  GtkStyleContext* style = gtk_widget_get_style_context(widget);
++  gtk_style_context_add_class(style, GTK_STYLE_CLASS_TOOLTIP);
++  return widget;
++}
++
++static GtkWidget*
++CreateExpanderWidget()
++{
++  GtkWidget* widget = gtk_expander_new("M");
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateFrameWidget()
++{
++  GtkWidget* widget = gtk_frame_new(nullptr);
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateGripperWidget()
++{
++  GtkWidget* widget = gtk_handle_box_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateToolbarWidget()
++{
++  GtkWidget* widget = gtk_toolbar_new();
++  gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_GRIPPER)), widget);
++  gtk_widget_realize(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateToolbarSeparatorWidget()
++{
++  GtkWidget* widget = GTK_WIDGET(gtk_separator_tool_item_new());
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateInfoBarWidget()
++{
++  GtkWidget* widget = gtk_info_bar_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateButtonWidget()
++{
++  GtkWidget* widget = gtk_button_new_with_label("M");
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateToggleButtonWidget()
++{
++  GtkWidget* widget = gtk_toggle_button_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateButtonArrowWidget()
++{
++  GtkWidget* widget = gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_OUT);
++  gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_TOGGLE_BUTTON)), widget);
++  gtk_widget_realize(widget);
++  gtk_widget_show(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateSpinWidget()
++{
++  GtkWidget* widget = gtk_spin_button_new(nullptr, 1, 0);
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateEntryWidget()
++{
++  GtkWidget* widget = gtk_entry_new();
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateScrolledWindowWidget()
++{
++  GtkWidget* widget = gtk_scrolled_window_new(nullptr, nullptr);
++  AddToWindowContainer(widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateTextViewWidget()
++{
++  GtkWidget* widget = gtk_text_view_new();
++  gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_SCROLLED_WINDOW)),
++                    widget);
++  return widget;
++}
++
++static GtkWidget*
++CreateMenuSeparatorWidget()
++{
++  GtkWidget* widget = gtk_separator_menu_item_new();
++  gtk_menu_shell_append(GTK_MENU_SHELL(GetWidget(MOZ_GTK_MENUPOPUP)),
++                        widget);
++  gtk_widget_realize(widget);
++  return widget;
++}
++
++
++static GtkWidget*
+ CreateWidget(WidgetNodeType aWidgetType)
+ {
+   switch (aWidgetType) {
+@@ -80,16 +243,54 @@ CreateWidget(WidgetNodeType aWidgetType)
+       return CreateWindowWidget();
+     case MOZ_GTK_WINDOW_CONTAINER:
+       return CreateWindowContainerWidget();
++    case MOZ_GTK_CHECKBUTTON_CONTAINER:
++      return CreateCheckboxWidget();
++    case MOZ_GTK_PROGRESSBAR:
++      return CreateProgressWidget();
++    case MOZ_GTK_RADIOBUTTON_CONTAINER:
++      return CreateRadiobuttonWidget();
+     case MOZ_GTK_SCROLLBAR_HORIZONTAL:
+       return CreateScrollbarWidget(aWidgetType,
+                                    GTK_ORIENTATION_HORIZONTAL);
+     case MOZ_GTK_SCROLLBAR_VERTICAL:
+       return CreateScrollbarWidget(aWidgetType,
+                                    GTK_ORIENTATION_VERTICAL);
+-    case MOZ_GTK_CHECKBUTTON_CONTAINER:
+-      return CreateCheckboxWidget();
+-    case MOZ_GTK_RADIOBUTTON_CONTAINER:
+-      return CreateRadiobuttonWidget();
++    case MOZ_GTK_MENUBAR:
++      return CreateMenuBarWidget();
++    case MOZ_GTK_MENUPOPUP:
++      return CreateMenuPopupWidget();
++    case MOZ_GTK_MENUBARITEM:
++      return CreateMenuItemWidget(MOZ_GTK_MENUBAR);
++    case MOZ_GTK_MENUITEM:
++      return CreateMenuItemWidget(MOZ_GTK_MENUPOPUP);
++    case MOZ_GTK_MENUSEPARATOR:
++      return CreateMenuSeparatorWidget();
++    case MOZ_GTK_EXPANDER:
++      return CreateExpanderWidget();
++    case MOZ_GTK_FRAME:
++      return CreateFrameWidget();
++    case MOZ_GTK_GRIPPER:
++      return CreateGripperWidget();
++    case MOZ_GTK_TOOLBAR:
++      return CreateToolbarWidget();
++    case MOZ_GTK_TOOLBAR_SEPARATOR:
++      return CreateToolbarSeparatorWidget();
++    case MOZ_GTK_INFO_BAR:
++      return CreateInfoBarWidget();
++    case MOZ_GTK_SPINBUTTON:
++      return CreateSpinWidget();
++    case MOZ_GTK_BUTTON:
++      return CreateButtonWidget();
++    case MOZ_GTK_TOGGLE_BUTTON:
++      return CreateToggleButtonWidget();
++    case MOZ_GTK_BUTTON_ARROW:
++      return CreateButtonArrowWidget();
++    case MOZ_GTK_ENTRY:
++      return CreateEntryWidget();
++    case MOZ_GTK_SCROLLED_WINDOW: 
++      return CreateScrolledWindowWidget();
++    case MOZ_GTK_TEXT_VIEW:
++      return CreateTextViewWidget();
+     default:
+       /* Not implemented */
+       return nullptr;
+@@ -107,17 +308,42 @@ GetWidget(WidgetNodeType aWidgetType)
+   return widget;
+ }
  
-     style = gtk_widget_get_style_context(accel_label);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sMenuText = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_INSENSITIVE, &color);
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, GTK_STATE_FLAG_INSENSITIVE);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sMenuTextInactive = GDK_RGBA_TO_NS_RGBA(color);
-+    gtk_style_context_restore(style);
- 
-     style = gtk_widget_get_style_context(menu);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
-     sMenuBackground = GDK_RGBA_TO_NS_RGBA(color);
- 
-     style = gtk_widget_get_style_context(menuitem);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, GTK_STATE_FLAG_PRELIGHT);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
-     sMenuHover = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sMenuHoverText = GDK_RGBA_TO_NS_RGBA(color);
-+    gtk_style_context_restore(style);
- 
-     g_object_unref(menu);
- #endif
-@@ -1278,44 +1328,54 @@ nsLookAndFeel::Init()
-             GDK_COLOR_TO_NS_RGB(style->dark[GTK_STATE_NORMAL]);
-     }
- #else
-+    GtkCssNode labelPath[] = {
-+       { GTK_TYPE_LABEL, "label", "view", NULL },
-+       { G_TYPE_NONE, "selection", NULL, NULL }
-+    };
+-static GtkStyleContext*
+-CreateCSSNode(const char* aName, GtkStyleContext *aParentStyle)
++GtkStyleContext*
++CreateStyleForWidget(GtkWidget* aWidget, GtkStyleContext* aParentStyle)
++{
++  GtkWidgetPath* path = aParentStyle ?
++    gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle)) :
++    gtk_widget_path_new();
 +
-+    GtkStyleContext *styleLabel;
-+    GtkStyleContext *styleSelection;
-+    GtkBorder padding;
++  // Work around https://bugzilla.gnome.org/show_bug.cgi?id=767312
++  // which exists in GTK+ 3.20.
++  gtk_widget_get_style_context(aWidget);
 +
-     // Text colors
--    style = gtk_widget_get_style_context(textView);
--    gtk_style_context_save(style);
--    gtk_style_context_add_class(style, GTK_STYLE_CLASS_VIEW);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    styleLabel = moz_gtk_style_create(labelPath, NULL);
-+    styleSelection = moz_gtk_style_create(labelPath+1, styleLabel);
++  gtk_widget_path_append_for_widget(path, aWidget);
++  // Release any floating reference on aWidget.
++  g_object_ref_sink(aWidget);
++  g_object_unref(aWidget);
 +
-+    gtk_style_context_get_background_color(styleLabel, gtk_style_context_get_state(styleLabel), &color);
-     sMozFieldBackground = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(styleLabel, gtk_style_context_get_state(styleLabel), &color);
-     sMozFieldText = GDK_RGBA_TO_NS_RGBA(color);
- 
-     // Selected text and background
--    gtk_style_context_get_background_color(style,
--        static_cast<GtkStateFlags>(GTK_STATE_FLAG_FOCUSED|GTK_STATE_FLAG_SELECTED),
--        &color);
-+    gtk_style_context_get_background_color(styleSelection, gtk_style_context_get_state(styleSelection), &color);
-     sTextSelectedBackground = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style,
--        static_cast<GtkStateFlags>(GTK_STATE_FLAG_FOCUSED|GTK_STATE_FLAG_SELECTED),
--        &color);
-+    gtk_style_context_get_color(styleSelection, gtk_style_context_get_state(styleSelection), &color);
-     sTextSelectedText = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_restore(style);
++  GtkStyleContext *context = gtk_style_context_new();
++  gtk_style_context_set_path(context, path);
++  gtk_style_context_set_parent(context, aParentStyle);
++  gtk_widget_path_unref(path);
++
++  return context;
++}
++
++GtkStyleContext*
++CreateCSSNode(const char* aName, GtkStyleContext* aParentStyle, GType aType)
+ {
+   static auto sGtkWidgetPathIterSetObjectName =
+     reinterpret_cast<void (*)(GtkWidgetPath *, gint, const char *)>
+     (dlsym(RTLD_DEFAULT, "gtk_widget_path_iter_set_object_name"));
  
-     // Button text, background, border
-     style = gtk_widget_get_style_context(label);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sButtonText = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, GTK_STATE_FLAG_PRELIGHT);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sButtonHoverText = GDK_RGBA_TO_NS_RGBA(color);
-+    gtk_style_context_restore(style);
- 
-     // Combobox text color
-     style = gtk_widget_get_style_context(comboboxLabel);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sComboBoxText = GDK_RGBA_TO_NS_RGBA(color);
+-  GtkWidgetPath* path =
+-    gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle));
++  GtkWidgetPath* path = aParentStyle ?
++    gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle)) :
++    gtk_widget_path_new();
  
-     // Menubar text and hover text colors    
-     style = gtk_widget_get_style_context(menuBar);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sMenuBarText = GDK_RGBA_TO_NS_RGBA(color);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
-+    gtk_style_context_save(style);
-+    gtk_style_context_set_state(style, GTK_STATE_FLAG_PRELIGHT);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sMenuBarHoverText = GDK_RGBA_TO_NS_RGBA(color);
-+    gtk_style_context_restore(style);
- 
-     // GTK's guide to fancy odd row background colors:
-     // 1) Check if a theme explicitly defines an odd row color
-@@ -1328,7 +1388,7 @@ nsLookAndFeel::Init()
-     // Get odd row background color
-     gtk_style_context_save(style);
-     gtk_style_context_add_region(style, GTK_STYLE_REGION_ROW, GTK_REGION_ODD);
--    gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_background_color(style, gtk_style_context_get_state(style), &color);
-     sOddCellBackground = GDK_RGBA_TO_NS_RGBA(color);
-     gtk_style_context_restore(style);
+-  gtk_widget_path_append_type(path, G_TYPE_NONE);
++  gtk_widget_path_append_type(path, aType);
  
-@@ -1346,9 +1406,11 @@ nsLookAndFeel::Init()
-     gtk_container_add(GTK_CONTAINER(parent), infoBar);
-     gtk_container_add(GTK_CONTAINER(infoBarContent), infoBarLabel);
-     style = gtk_widget_get_style_context(infoBarLabel);
-+    gtk_style_context_save(style);
-     gtk_style_context_add_class(style, GTK_STYLE_CLASS_INFO);
--    gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
-+    gtk_style_context_get_color(style, gtk_style_context_get_state(style), &color);
-     sInfoBarText = GDK_RGBA_TO_NS_RGBA(color);
-+    gtk_style_context_restore(style);
+   (*sGtkWidgetPathIterSetObjectName)(path, -1, aName);
+ 
+@@ -130,95 +356,168 @@ CreateCSSNode(const char* aName, GtkStyl
+ }
+ 
+ static GtkStyleContext*
+-GetChildNodeStyle(WidgetNodeType aStyleType,
+-                  WidgetNodeType aWidgetType,
+-                  const gchar*   aStyleClass,
+-                  WidgetNodeType aParentNodeType)
++CreateChildCSSNode(const char* aName, WidgetNodeType aParentNodeType)
+ {
+-  GtkStyleContext* style;
+-
+-  if (gtk_check_version(3, 20, 0) != nullptr) {
+-    style = gtk_widget_get_style_context(sWidgetStorage[aWidgetType]);
+-
+-    gtk_style_context_save(style);
+-    MOZ_ASSERT(!sStyleContextNeedsRestore);
+-    sStyleContextNeedsRestore = true;
+-
+-    gtk_style_context_add_class(style, aStyleClass);
+-  }
+-  else {
+-    style = sStyleStorage[aStyleType];
+-    if (!style) {
+-      style = CreateCSSNode(aStyleClass, GetStyleInternal(aParentNodeType));
+-      MOZ_ASSERT(!sStyleContextNeedsRestore);
+-      sStyleStorage[aStyleType] = style;
+-    }
+-  }
++  return CreateCSSNode(aName, GetCssNodeStyleInternal(aParentNodeType));
++}
+ 
++static GtkStyleContext*
++GetWidgetStyleWithClass(WidgetNodeType aWidgetType, const gchar* aStyleClass)
++{
++  GtkStyleContext* style = gtk_widget_get_style_context(GetWidget(aWidgetType));
++  gtk_style_context_save(style);
++  MOZ_ASSERT(!sStyleContextNeedsRestore);
++  sStyleContextNeedsRestore = true;
++  gtk_style_context_add_class(style, aStyleClass);
+   return style;
+ }
+ 
++/* GetCssNodeStyleInternal is used by Gtk >= 3.20 */
+ static GtkStyleContext*
+-GetStyleInternal(WidgetNodeType aNodeType)
++GetCssNodeStyleInternal(WidgetNodeType aNodeType)
+ {
++  GtkStyleContext* style = sStyleStorage[aNodeType];
++  if (style)
++    return style;
++
+   switch (aNodeType) {
+-    case MOZ_GTK_SCROLLBAR_HORIZONTAL:
+-      /* Root CSS node / widget for scrollbars */
++    case MOZ_GTK_SCROLLBAR_CONTENTS_HORIZONTAL:
++      style = CreateChildCSSNode("contents",
++                                 MOZ_GTK_SCROLLBAR_HORIZONTAL);
+       break;
+     case MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_SCROLLBAR_HORIZONTAL,
+-                               GTK_STYLE_CLASS_TROUGH,
+-                               MOZ_GTK_SCROLLBAR_HORIZONTAL);
+-
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
++                                 MOZ_GTK_SCROLLBAR_CONTENTS_HORIZONTAL);
++      break;
+     case MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_SCROLLBAR_HORIZONTAL,
+-                               GTK_STYLE_CLASS_SLIDER,
+-                               MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL);
+-
+-    case MOZ_GTK_SCROLLBAR_VERTICAL:
+-      /* Root CSS node / widget for scrollbars */
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_SLIDER,
++                                 MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL);
++      break;
++    case MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL:
++      style = CreateChildCSSNode("contents",
++                                 MOZ_GTK_SCROLLBAR_VERTICAL);
+       break;
+     case MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_SCROLLBAR_VERTICAL,
+-                               GTK_STYLE_CLASS_TROUGH,
+-                               MOZ_GTK_SCROLLBAR_VERTICAL);
+-
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
++                                 MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL);
++      break;
+     case MOZ_GTK_SCROLLBAR_THUMB_VERTICAL:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_SCROLLBAR_VERTICAL,
+-                               GTK_STYLE_CLASS_SLIDER,
+-                               MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL);
+-
+-    case MOZ_GTK_RADIOBUTTON_CONTAINER:
+-      /* Root CSS node / widget for checkboxes */
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_SLIDER,
++                                 MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL);
+       break;
+     case MOZ_GTK_RADIOBUTTON:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_RADIOBUTTON_CONTAINER,
+-                               GTK_STYLE_CLASS_RADIO,
+-                               MOZ_GTK_RADIOBUTTON_CONTAINER);
+-    case MOZ_GTK_CHECKBUTTON_CONTAINER:
+-      /* Root CSS node / widget for radiobuttons */
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_RADIO,
++                                 MOZ_GTK_RADIOBUTTON_CONTAINER);
+       break;
+     case MOZ_GTK_CHECKBUTTON:
+-      return GetChildNodeStyle(aNodeType,
+-                               MOZ_GTK_CHECKBUTTON_CONTAINER,
+-                               GTK_STYLE_CLASS_CHECK,
+-                               MOZ_GTK_CHECKBUTTON_CONTAINER);
+-    default:
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_CHECK,
++                                 MOZ_GTK_CHECKBUTTON_CONTAINER);
++      break;
++    case MOZ_GTK_PROGRESS_TROUGH:
++      /* Progress bar background (trough) */
++      style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
++                                 MOZ_GTK_PROGRESSBAR);
++      break;
++    case MOZ_GTK_PROGRESS_CHUNK:
++      style = CreateChildCSSNode("progress",
++                                 MOZ_GTK_PROGRESS_TROUGH);
+       break;
++    case MOZ_GTK_TOOLTIP:
++      // We create this from the path because GtkTooltipWindow is not public.
++      style = CreateCSSNode("tooltip", nullptr, GTK_TYPE_TOOLTIP);
++      gtk_style_context_add_class(style, GTK_STYLE_CLASS_BACKGROUND);
++      break; 
++    case MOZ_GTK_GRIPPER:
++      // TODO - create from CSS node
++      return GetWidgetStyleWithClass(MOZ_GTK_GRIPPER,
++                                     GTK_STYLE_CLASS_GRIP);
++    case MOZ_GTK_INFO_BAR:
++      // TODO - create from CSS node
++      return GetWidgetStyleWithClass(MOZ_GTK_INFO_BAR,
++                                     GTK_STYLE_CLASS_INFO);
++    case MOZ_GTK_SPINBUTTON_ENTRY:
++      // TODO - create from CSS node
++      return GetWidgetStyleWithClass(MOZ_GTK_SPINBUTTON,
++                                     GTK_STYLE_CLASS_ENTRY);
++    case MOZ_GTK_SCROLLED_WINDOW:
++      // TODO - create from CSS node
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLED_WINDOW,
++                                     GTK_STYLE_CLASS_FRAME);
++    case MOZ_GTK_TEXT_VIEW:
++      // TODO - create from CSS node
++      return GetWidgetStyleWithClass(MOZ_GTK_TEXT_VIEW,
++                                     GTK_STYLE_CLASS_VIEW);
++    default:
++      // TODO - create style from style path
++      GtkWidget* widget = GetWidget(aNodeType);
++      return gtk_widget_get_style_context(widget);
+   }
+ 
+-  GtkWidget* widget = GetWidget(aNodeType);
+-  if (widget) {
+-    return gtk_widget_get_style_context(widget);
+-  }
++  MOZ_ASSERT(style, "missing style context for node type");
++  sStyleStorage[aNodeType] = style;
++  return style;
++}
+ 
+-  MOZ_ASSERT_UNREACHABLE("missing style context for node type");
+-  return nullptr;
++/* GetWidgetStyleInternal is used by Gtk < 3.20 */
++static GtkStyleContext*
++GetWidgetStyleInternal(WidgetNodeType aNodeType)
++{
++  switch (aNodeType) {
++    case MOZ_GTK_SCROLLBAR_TROUGH_HORIZONTAL:
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLBAR_HORIZONTAL,
++                                     GTK_STYLE_CLASS_TROUGH);
++    case MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL:
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLBAR_HORIZONTAL,
++                                     GTK_STYLE_CLASS_SLIDER);
++    case MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL:
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLBAR_VERTICAL,
++                                     GTK_STYLE_CLASS_TROUGH);
++    case MOZ_GTK_SCROLLBAR_THUMB_VERTICAL:
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLBAR_VERTICAL,
++                                     GTK_STYLE_CLASS_SLIDER);
++    case MOZ_GTK_RADIOBUTTON:
++      return GetWidgetStyleWithClass(MOZ_GTK_RADIOBUTTON_CONTAINER,
++                                     GTK_STYLE_CLASS_RADIO);
++    case MOZ_GTK_CHECKBUTTON:
++      return GetWidgetStyleWithClass(MOZ_GTK_CHECKBUTTON_CONTAINER,
++                                     GTK_STYLE_CLASS_CHECK);
++    case MOZ_GTK_PROGRESS_TROUGH:
++      return GetWidgetStyleWithClass(MOZ_GTK_PROGRESSBAR,
++                                     GTK_STYLE_CLASS_TROUGH);
++    case MOZ_GTK_TOOLTIP: {
++      GtkStyleContext* style = sStyleStorage[aNodeType];
++      if (style)
++        return style;
++
++      // The tooltip style class is added first in CreateTooltipWidget() so
++      // that gtk_widget_path_append_for_widget() in CreateStyleForWidget()
++      // will find it.
++      GtkWidget* tooltipWindow = CreateTooltipWidget();
++      style = CreateStyleForWidget(tooltipWindow, nullptr);
++      gtk_widget_destroy(tooltipWindow); // Release GtkWindow self-reference.
++      sStyleStorage[aNodeType] = style;
++      return style;
++    }
++    case MOZ_GTK_GRIPPER:
++      return GetWidgetStyleWithClass(MOZ_GTK_GRIPPER,
++                                     GTK_STYLE_CLASS_GRIP);
++    case MOZ_GTK_INFO_BAR:
++      return GetWidgetStyleWithClass(MOZ_GTK_INFO_BAR,
++                                     GTK_STYLE_CLASS_INFO);
++    case MOZ_GTK_SPINBUTTON_ENTRY:
++      return GetWidgetStyleWithClass(MOZ_GTK_SPINBUTTON,
++                                     GTK_STYLE_CLASS_ENTRY);
++    case MOZ_GTK_SCROLLED_WINDOW:
++      return GetWidgetStyleWithClass(MOZ_GTK_SCROLLED_WINDOW,
++                                     GTK_STYLE_CLASS_FRAME);
++    case MOZ_GTK_TEXT_VIEW:
++      return GetWidgetStyleWithClass(MOZ_GTK_TEXT_VIEW,
++                                     GTK_STYLE_CLASS_VIEW);
++    default:
++      GtkWidget* widget = GetWidget(aNodeType);
++      MOZ_ASSERT(widget);
++      return gtk_widget_get_style_context(widget);
++  }
+ }
+ 
+ void
+@@ -245,13 +544,39 @@ ResetWidgetCache(void)
+ 
+ GtkStyleContext*
+ ClaimStyleContext(WidgetNodeType aNodeType, GtkTextDirection aDirection,
+-                  StyleFlags aFlags)
++                  GtkStateFlags aStateFlags, StyleFlags aFlags)
+ {
+-  GtkStyleContext* style = GetStyleInternal(aNodeType);
++  MOZ_ASSERT(!sStyleContextNeedsRestore);
++  GtkStyleContext* style;
++  if (gtk_check_version(3, 20, 0) != nullptr) {
++    style = GetWidgetStyleInternal(aNodeType);
++  } else {
++    style = GetCssNodeStyleInternal(aNodeType);
++  }
+ #ifdef DEBUG
+   MOZ_ASSERT(!sCurrentStyleContext);
+   sCurrentStyleContext = style;
  #endif
-     // Some themes have a unified menu bar, and support window dragging on it
-     gboolean supports_menubar_drag = FALSE;
-diff -up firefox-47.0/widget/gtk/nsNativeThemeGTK.cpp.gtk3-20 firefox-47.0/widget/gtk/nsNativeThemeGTK.cpp
---- firefox-47.0/widget/gtk/nsNativeThemeGTK.cpp.gtk3-20	2016-06-01 06:11:44.000000000 +0200
-+++ firefox-47.0/widget/gtk/nsNativeThemeGTK.cpp	2016-06-23 10:21:37.074462101 +0200
-@@ -1570,9 +1570,6 @@ nsNativeThemeGTK::GetMinimumWidgetSize(n
-   case NS_THEME_RADIO_CONTAINER:
-   case NS_THEME_CHECKBOX_LABEL:
-   case NS_THEME_RADIO_LABEL:
--  case NS_THEME_BUTTON:
--  case NS_THEME_DROPDOWN:
--  case NS_THEME_TOOLBAR_BUTTON:
-   case NS_THEME_TREEVIEW_HEADER_CELL:
-     {
-       if (aWidgetType == NS_THEME_DROPDOWN) {
-@@ -1591,6 +1588,21 @@ nsNativeThemeGTK::GetMinimumWidgetSize(n
-       aResult->height += border.top + border.bottom;
-     }
-     break;
-+  case NS_THEME_BUTTON:
-+  case NS_THEME_DROPDOWN:
-+  case NS_THEME_TOOLBAR_BUTTON:
-+    {
-+        moz_gtk_get_button_height(&aResult->height);
++  GtkStateFlags oldState = gtk_style_context_get_state(style);
++  GtkTextDirection oldDirection = gtk_style_context_get_direction(style);
++  if (oldState != aStateFlags || oldDirection != aDirection) {
++    // From GTK 3.8, set_state() will overwrite the direction, so set
++    // direction after state.
++    gtk_style_context_set_state(style, aStateFlags);
++    gtk_style_context_set_direction(style, aDirection);
++
++    // This invalidate is necessary for unsaved style contexts from GtkWidgets
++    // in pre-3.18 GTK, because automatic invalidation of such contexts
++    // was delayed until a resize event runs.
++    //
++    // https://bugzilla.mozilla.org/show_bug.cgi?id=1272194#c7
++    //
++    // Avoid calling invalidate on saved contexts to avoid performing
++    // build_properties() (in 3.16 stylecontext.c) unnecessarily early.
++    if (!sStyleContextNeedsRestore) {
++      gtk_style_context_invalidate(style);
 +    }
-+    break;
-+  case NS_THEME_FOCUS_OUTLINE:
-+  case NS_THEME_NUMBER_INPUT:
-+  case NS_THEME_TEXTFIELD:
-+  case NS_THEME_TEXTFIELD_MULTILINE:
-+    {
-+        moz_gtk_get_entry_height(&aResult->height);
-+    } 
-+    break;
-   case NS_THEME_TOOLBAR_SEPARATOR:
-     {
-       gint separator_width;
++  }
+   return style;
+ }
+ 
+diff -up firefox-48.0/widget/gtk/WidgetStyleCache.h.gtk3-20 firefox-48.0/widget/gtk/WidgetStyleCache.h
+--- firefox-48.0/widget/gtk/WidgetStyleCache.h.gtk3-20	2016-07-25 22:22:07.000000000 +0200
++++ firefox-48.0/widget/gtk/WidgetStyleCache.h	2016-07-29 09:15:11.825285869 +0200
+@@ -21,10 +21,24 @@ enum : StyleFlags {
+ GtkWidget*
+ GetWidget(WidgetNodeType aNodeType);
+ 
++/*
++ * Return a new style context based on aWidget, as a child of aParentStyle.
++ * If aWidget still has a floating reference, then it is sunk and released.
++ */
++GtkStyleContext*
++CreateStyleForWidget(GtkWidget* aWidget, GtkStyleContext* aParentStyle);
++
++// CreateCSSNode is implemented for gtk >= 3.20 only.
++GtkStyleContext*
++CreateCSSNode(const char*      aName,
++              GtkStyleContext* aParentStyle,
++              GType            aType = G_TYPE_NONE);
++
+ // Callers must call ReleaseStyleContext() on the returned context.
+ GtkStyleContext*
+ ClaimStyleContext(WidgetNodeType aNodeType,
+                   GtkTextDirection aDirection = GTK_TEXT_DIR_LTR,
++                  GtkStateFlags aStateFlags = GTK_STATE_FLAG_NORMAL,
+                   StyleFlags aFlags = NO_STYLE_FLAGS);
+ void
+ ReleaseStyleContext(GtkStyleContext* style);
diff --git a/libre/iceweasel/libre.patch b/libre/iceweasel/libre.patch
index b2006cdc8..a434fef2f 100644
--- a/libre/iceweasel/libre.patch
+++ b/libre/iceweasel/libre.patch
@@ -67,7 +67,7 @@ index c1ef3a4..48e1a16 100644
  }
  
 diff --git a/browser/base/content/abouthome/aboutHome.js b/browser/base/content/abouthome/aboutHome.js
-index 71fa3c9..1d6c9d9 100644
+index 8943165..cd2efd8 100644
 --- a/browser/base/content/abouthome/aboutHome.js
 +++ b/browser/base/content/abouthome/aboutHome.js
 @@ -9,17 +9,13 @@
@@ -116,7 +116,7 @@ index 655f64b..6dd78e5 100644
    </body>
  </html>
 diff --git a/browser/base/jar.mn b/browser/base/jar.mn
-index 1db858d..a9e7b17 100644
+index c9a70fc..ab0f1dd 100644
 --- a/browser/base/jar.mn
 +++ b/browser/base/jar.mn
 @@ -32,7 +32,8 @@ browser.jar:
@@ -138,7 +138,7 @@ index 1db858d..a9e7b17 100644
          content/browser/aboutNetError.xhtml            (content/aboutNetError.xhtml)
  
 diff --git a/browser/locales/en-US/chrome/browser/aboutHome.dtd b/browser/locales/en-US/chrome/browser/aboutHome.dtd
-index ed979de..6edc89d 100644
+index 7e3b57a..6edc89d 100644
 --- a/browser/locales/en-US/chrome/browser/aboutHome.dtd
 +++ b/browser/locales/en-US/chrome/browser/aboutHome.dtd
 @@ -11,14 +11,6 @@
@@ -152,7 +152,7 @@ index ed979de..6edc89d 100644
 -<!-- LOCALIZATION NOTE (abouthome.defaultSnippet2.v1):
 -     text in <a/> will be linked to the featured add-ons on addons.mozilla.org
 --->
--<!ENTITY abouthome.defaultSnippet2.v1 "It's easy to customize your Firefox exactly the way you want it. <a>Choose from thousands of add-ons</a>.">
+-<!ENTITY abouthome.defaultSnippet2.v1 "It’s easy to customize your Firefox exactly the way you want it. <a>Choose from thousands of add-ons</a>.">
  <!-- LOCALIZATION NOTE (abouthome.rightsSnippet): text in <a/> will be linked to about:rights -->
  <!ENTITY abouthome.rightsSnippet "&brandFullName; is free and open source software from the non-profit Mozilla Foundation. <a>Know your rights…</a>">
  
@@ -239,15 +239,15 @@ index cba600e..cd4e711 100644
      </DL><p>
  </DL><p>
 diff --git a/devtools/client/locales/en-US/connection-screen.dtd b/devtools/client/locales/en-US/connection-screen.dtd
-index ba304a3..4274e50 100644
+index 674a408..d27e97f 100644
 --- a/devtools/client/locales/en-US/connection-screen.dtd
 +++ b/devtools/client/locales/en-US/connection-screen.dtd
 @@ -24,7 +24,7 @@
  <!-- LOCALIZATION NOTE (remoteHelp, remoteDocumentation, remoteHelpSuffix):
  these strings will be concatenated in a single label, remoteDocumentation will
  be used as text for a link to MDN. -->
--<!ENTITY remoteHelp "Firefox Developer Tools can debug remote devices (Firefox for Android and Firefox OS, for example). Make sure that you have turned on the 'Remote debugging' option in the remote device. For more, see the ">
-+<!ENTITY remoteHelp "Iceweasel Developer Tools can debug remote devices. Make sure that you have turned on the 'Remote debugging' option in the remote device. For more, see the ">
+-<!ENTITY remoteHelp "Firefox Developer Tools can debug remote devices (Firefox for Android and Firefox OS, for example). Make sure that you have turned on the ‘Remote debugging’ option in the remote device. For more, see the ">
++<!ENTITY remoteHelp "Iceweasel Developer Tools can debug remote devices. Make sure that you have turned on the ‘Remote debugging’ option in the remote device. For more, see the ">
  <!ENTITY remoteDocumentation "documentation">
  <!ENTITY remoteHelpSuffix ".">
  
@@ -287,7 +287,7 @@ index 53385de..fb9a95a 100644
  <!-- LOCALIZATION NOTE (options.selectAdditionalTools.label): This is the label for
    -  the heading of group of checkboxes corresponding to the developer tools
 diff --git a/devtools/client/locales/en-US/webide.dtd b/devtools/client/locales/en-US/webide.dtd
-index 4a12b2f..ff879b6 100644
+index 5e1a80c..8f375da 100644
 --- a/devtools/client/locales/en-US/webide.dtd
 +++ b/devtools/client/locales/en-US/webide.dtd
 @@ -2,7 +2,7 @@
@@ -309,7 +309,7 @@ index 4a12b2f..ff879b6 100644
  <!ENTITY key_quit "W">
  <!-- open menu -->
 diff --git a/devtools/client/locales/en-US/webide.properties b/devtools/client/locales/en-US/webide.properties
-index 441e993..dee7e08 100644
+index 2368ad7..05e39c7 100644
 --- a/devtools/client/locales/en-US/webide.properties
 +++ b/devtools/client/locales/en-US/webide.properties
 @@ -2,8 +2,8 @@
diff --git a/libre/iceweasel/mozconfig b/libre/iceweasel/mozconfig
index 2b7e3400a..b3dde9a7d 100644
--- a/libre/iceweasel/mozconfig
+++ b/libre/iceweasel/mozconfig
@@ -4,6 +4,7 @@ ac_add_options --prefix=/usr
 ac_add_options --enable-release
 ac_add_options --enable-gold
 ac_add_options --enable-pie
+ac_add_options --enable-rust
 
 # Iceweasel
 ac_add_options --disable-official-branding
diff --git a/libre/iceweasel/mozilla-1245076-1.patch b/libre/iceweasel/mozilla-1245076-1.patch
deleted file mode 100644
index dfc52c2cf..000000000
--- a/libre/iceweasel/mozilla-1245076-1.patch
+++ /dev/null
@@ -1,49 +0,0 @@
-diff --git a/config/gcc-stl-wrapper.template.h b/config/gcc-stl-wrapper.template.h
---- a/config/gcc-stl-wrapper.template.h
-+++ b/config/gcc-stl-wrapper.template.h
-@@ -12,33 +12,39 @@
- // compiling ObjC.
- #if defined(__EXCEPTIONS) && __EXCEPTIONS && !(__OBJC__ && __GNUC__ && XP_IOS)
- #  error "STL code can only be used with -fno-exceptions"
- #endif
- 
- // Silence "warning: #include_next is a GCC extension"
- #pragma GCC system_header
- 
-+#ifndef moz_dont_include_mozalloc_for_cstdlib
-+#  define moz_dont_include_mozalloc_for_cstdlib
-+#endif
-+#ifndef moz_dont_include_mozalloc_for_${HEADER}
- // mozalloc.h wants <new>; break the cycle by always explicitly
- // including <new> here.  NB: this is a tad sneaky.  Sez the gcc docs:
- //
- //    `#include_next' does not distinguish between <file> and "file"
- //    inclusion, nor does it check that the file you specify has the
- //    same name as the current file. It simply looks for the file
- //    named, starting with the directory in the search path after the
- //    one where the current file was found.
--#include_next <new>
-+#  include_next <new>
- 
- // See if we're in code that can use mozalloc.  NB: this duplicates
- // code in nscore.h because nscore.h pulls in prtypes.h, and chromium
- // can't build with that being included before base/basictypes.h.
--#if !defined(XPCOM_GLUE) && !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
--#  include "mozilla/mozalloc.h"
--#else
--#  error "STL code can only be used with infallible ::operator new()"
-+#  if !defined(XPCOM_GLUE) && !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
-+#    include "mozilla/mozalloc.h"
-+#  else
-+#    error "STL code can only be used with infallible ::operator new()"
-+#  endif
-+
- #endif
- 
- #if defined(DEBUG) && !defined(_GLIBCXX_DEBUG)
- // Enable checked iterators and other goodies
- //
- // FIXME/bug 551254: gcc's debug STL implementation requires -frtti.
- // Figure out how to resolve this with -fno-rtti.  Maybe build with
- // -frtti in DEBUG builds?
-
diff --git a/libre/iceweasel/mozilla-1245076.patch b/libre/iceweasel/mozilla-1245076.patch
deleted file mode 100644
index c3f06f19a..000000000
--- a/libre/iceweasel/mozilla-1245076.patch
+++ /dev/null
@@ -1,23 +0,0 @@
-diff --git a/gfx/graphite2/src/Collider.cpp b/gfx/graphite2/src/Collider.cpp
---- a/gfx/graphite2/src/Collider.cpp
-+++ b/gfx/graphite2/src/Collider.cpp
-@@ -21,17 +21,17 @@
- 
- Alternatively, the contents of this file may be used under the terms of the
- Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
- License, as published by the Free Software Foundation, either version 2
- of the License or (at your option) any later version.
- */
- #include <algorithm>
- #include <limits>
--#include <math.h>
-+#include <cmath>
- #include <string>
- #include <functional>
- #include "inc/Collider.h"
- #include "inc/Segment.h"
- #include "inc/Slot.h"
- #include "inc/GlyphCache.h"
- #include "inc/Sparse.h"
- 
-
diff --git a/libre/iceweasel/remove-default-and-shell-icons-in-packaging-manifest.patch b/libre/iceweasel/remove-default-and-shell-icons-in-packaging-manifest.patch
new file mode 100644
index 000000000..6bc67b30a
--- /dev/null
+++ b/libre/iceweasel/remove-default-and-shell-icons-in-packaging-manifest.patch
@@ -0,0 +1,34 @@
+diff --git a/browser/installer/package-manifest.in b/browser/installer/package-manifest.in
+index cffcff1..85d28cc 100644
+--- a/browser/installer/package-manifest.in
++++ b/browser/installer/package-manifest.in
+@@ -653,11 +653,6 @@
+ @RESPATH@/chrome/toolkit.manifest
+ @RESPATH@/chrome/recording.manifest
+ @RESPATH@/chrome/recording/*
+-#ifdef MOZ_GTK
+-@RESPATH@/browser/chrome/icons/default/default16.png
+-@RESPATH@/browser/chrome/icons/default/default32.png
+-@RESPATH@/browser/chrome/icons/default/default48.png
+-#endif
+ @RESPATH@/browser/features/*
+ 
+ ; [Webide Files]
+@@ -670,17 +665,10 @@
+ @RESPATH@/browser/chrome/devtools.manifest
+ @RESPATH@/browser/@PREF_DIR@/devtools.js
+ 
+-; shell icons
+-#ifdef XP_UNIX
+-#ifndef XP_MACOSX
+-; shell icons
+-@RESPATH@/browser/icons/*.png
+ #ifdef MOZ_UPDATER
+ ; updater icon
+ @RESPATH@/icons/updater.png
+ #endif
+-#endif
+-#endif
+ 
+ ; [Default Preferences]
+ ; All the pref files must be part of base to prevent migration bugs
diff --git a/libre/iceweasel/vendor.js b/libre/iceweasel/vendor.js
index 830686cfb..51fb75917 100644
--- a/libre/iceweasel/vendor.js
+++ b/libre/iceweasel/vendor.js
@@ -70,9 +70,9 @@ pref("app.update.url", "http://127.0.0.1/");"
 // Spoof the useragent to a generic one
 pref("general.useragent.compatMode.firefox", true);
 // Spoof the useragent to a generic one
-pref("general.useragent.override", "Mozilla/5.0 (Windows NT 6.1; rv:47.0) Gecko/20100101 Firefox/47.0");
+pref("general.useragent.override", "Mozilla/5.0 (Windows NT 6.1; rv:48.0) Gecko/20100101 Firefox/48.0");
 pref("general.appname.override", "Netscape");
-pref("general.appversion.override", "47.0");
+pref("general.appversion.override", "48.0");
 pref("general.buildID.override", "Gecko/20100101");
 pref("general.oscpu.override", "Windows NT 6.1");
 pref("general.platform.override", "Win32");