--- a/widget/gtk/WidgetStyleCache.cpp
+++ b/widget/gtk/WidgetStyleCache.cpp
@@ -28,34 +28,32 @@ static GtkStyleContext*
 GetWidgetRootStyle(WidgetNodeType aNodeType);
 static GtkStyleContext*
 GetCssNodeStyleInternal(WidgetNodeType aNodeType);
 
 static GtkWidget*
 CreateWindowWidget()
 {
   GtkWidget *widget = gtk_window_new(GTK_WINDOW_POPUP);
-  gtk_widget_realize(widget);
   gtk_widget_set_name(widget, "MozillaGtkWidget");
   return widget;
 }
 
 static GtkWidget*
 CreateWindowContainerWidget()
 {
   GtkWidget *widget = gtk_fixed_new();
   gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_WINDOW)), widget);
   return widget;
 }
 
 static void
 AddToWindowContainer(GtkWidget* widget)
 {
   gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_WINDOW_CONTAINER)), widget);
-  gtk_widget_realize(widget);
 }
 
 static GtkWidget*
 CreateScrollbarWidget(WidgetNodeType aWidgetType, GtkOrientation aOrientation)
 {
   GtkWidget* widget = gtk_scrollbar_new(aOrientation, nullptr);
   AddToWindowContainer(widget);
   return widget;
@@ -137,17 +135,16 @@ CreateGripperWidget()
   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);
@@ -178,17 +175,16 @@ CreateToggleButtonWidget()
   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);
@@ -221,18 +217,16 @@ typedef struct
 static void
 GetInnerWidget(GtkWidget* widget, gpointer client_data)
 {
   auto info = static_cast<GtkInnerWidgetInfo*>(client_data);
 
   if (G_TYPE_CHECK_INSTANCE_TYPE(widget, info->type)) {
     *info->widget = widget;
   }
-
-  gtk_widget_realize(widget);
 }
 
 static GtkWidget*
 CreateComboBoxButtonWidget()
 {
   GtkWidget* comboBox = GetWidget(MOZ_GTK_COMBOBOX);
   GtkWidget* comboBoxButton = nullptr;
 
@@ -282,17 +276,16 @@ CreateComboBoxArrowWidget()
     GtkInnerWidgetInfo info = { GTK_TYPE_ARROW,
                                 &comboBoxArrow };
     gtk_container_forall(GTK_CONTAINER(buttonChild),
                          GetInnerWidget, &info);
   } else if (GTK_IS_ARROW(buttonChild)) {
     /* appears-as-list = TRUE, or cell-view = FALSE;
      * the button only contains an arrow */
     comboBoxArrow = buttonChild;
-    gtk_widget_realize(comboBoxArrow);
   }
 
   if (!comboBoxArrow) {
     /* Shouldn't be reached with current internal gtk implementation;
      * we gButtonArrowWidget as last resort fallback to avoid
      * crashing. */
     comboBoxArrow = GetWidget(MOZ_GTK_BUTTON_ARROW);
   } else {
@@ -411,17 +404,16 @@ CreateComboBoxEntryArrowWidget()
     GtkInnerWidgetInfo info = { GTK_TYPE_ARROW,
                                 &comboBoxArrow };
     gtk_container_forall(GTK_CONTAINER(buttonChild),
                          GetInnerWidget, &info);
   } else if (GTK_IS_ARROW(buttonChild)) {
     /* appears-as-list = TRUE, or cell-view = FALSE;
      * the button only contains an arrow */
     comboBoxArrow = buttonChild;
-    gtk_widget_realize(comboBoxArrow);
   }
 
   if (!comboBoxArrow) {
     /* Shouldn't be reached with current internal gtk implementation;
      * we gButtonArrowWidget as last resort fallback to avoid
      * crashing. */
     comboBoxArrow = GetWidget(MOZ_GTK_BUTTON_ARROW);
   } else {
@@ -451,17 +443,16 @@ CreateTextViewWidget()
 }
 
 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*
 CreateTreeViewWidget()
 {
   GtkWidget* widget = gtk_tree_view_new();
   AddToWindowContainer(widget);