diff --git a/dom/ipc/PBrowser.ipdl b/dom/ipc/PBrowser.ipdl
index 05d3a273a4e5..c1847eecc5df 100644
--- a/dom/ipc/PBrowser.ipdl
+++ b/dom/ipc/PBrowser.ipdl
@@ -49,10 +49,24 @@ using mozilla::dom::ScreenOrientation from "mozilla/dom/ScreenOrientation.h";
 using struct mozilla::layers::TextureFactoryIdentifier from "mozilla/layers/CompositorTypes.h";
 using mozilla::CSSPoint from "Units.h";
 using mozilla::CSSToScreenScale from "Units.h";
+using mozilla::CommandInt from "mozilla/EventForwards.h";
 
 namespace mozilla {
 namespace dom {
 
+struct NativeKeyBinding
+{
+  CommandInt[] singleLineCommands;
+  CommandInt[] multiLineCommands;
+  CommandInt[] richTextCommands;
+};
+
+union MaybeNativeKeyBinding
+{
+  NativeKeyBinding;
+  void_t;
+};
+
 intr protocol PBrowser
 {
     manager PContent;
@@ -419,7 +433,7 @@ child:
                bool aIgnoreRootScrollFrame);
 
     RealMouseEvent(WidgetMouseEvent event);
-    RealKeyEvent(WidgetKeyboardEvent event);
+    RealKeyEvent(WidgetKeyboardEvent event, MaybeNativeKeyBinding keyBinding);
     MouseWheelEvent(WidgetWheelEvent event);
     RealTouchEvent(WidgetTouchEvent aEvent, ScrollableLayerGuid aGuid);
     // We use a separate message for touchmove events only to apply
diff --git a/dom/ipc/TabChild.cpp b/dom/ipc/TabChild.cpp
index 8178e89ebf50..9b3ed3b8b0af 100644
--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -1917,8 +1917,20 @@ TabChild::RecvRealTouchMoveEvent(const WidgetTouchEvent& aEvent,
 }
 
 bool
-TabChild::RecvRealKeyEvent(const WidgetKeyboardEvent& event)
-{
+TabChild::RecvRealKeyEvent(const WidgetKeyboardEvent& event,
+                           const MaybeNativeKeyBinding& aBindings)
+ {
+  if (event.message == NS_KEY_PRESS) {
+    PuppetWidget* widget = static_cast<PuppetWidget*>(mWidget.get());
+    if (aBindings.type() == MaybeNativeKeyBinding::TNativeKeyBinding) {
+      const NativeKeyBinding& bindings = aBindings;
+      widget->CacheNativeKeyCommands(bindings.singleLineCommands(),
+                                     bindings.multiLineCommands(),
+                                     bindings.richTextCommands());
+    } else {
+      widget->ClearNativeKeyCommands();
+    }
+  }
   // If content code called preventDefault() on a keydown event, then we don't
   // want to process any following keypress events.
   if (event.message == NS_KEY_PRESS && mIgnoreKeyPressEvent) {
diff --git a/dom/ipc/TabChild.h b/dom/ipc/TabChild.h
index 115abcebac53..f46e3d17ab66 100644
--- a/dom/ipc/TabChild.h
+++ b/dom/ipc/TabChild.h
@@ -238,7 +238,8 @@ public:
                                 const int32_t&  aModifiers,
                                 const bool&     aIgnoreRootScrollFrame) MOZ_OVERRIDE;
     virtual bool RecvRealMouseEvent(const mozilla::WidgetMouseEvent& event) MOZ_OVERRIDE;
-    virtual bool RecvRealKeyEvent(const mozilla::WidgetKeyboardEvent& event) MOZ_OVERRIDE;
+    virtual bool RecvRealKeyEvent(const mozilla::WidgetKeyboardEvent& event,
+                                  const MaybeNativeKeyBinding& aBindings) MOZ_OVERRIDE;
     virtual bool RecvMouseWheelEvent(const mozilla::WidgetWheelEvent& event) MOZ_OVERRIDE;
     virtual bool RecvRealTouchEvent(const WidgetTouchEvent& aEvent,
                                     const ScrollableLayerGuid& aGuid) MOZ_OVERRIDE;
diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index 48760c47523c..280b72831911 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -788,6 +788,12 @@ bool TabParent::SendMouseWheelEvent(WidgetWheelEvent& event)
   return PBrowserParent::SendMouseWheelEvent(event);
 }
 
+static void
+DoCommandCallback(mozilla::Command aCommand, void* aData)
+{
+  static_cast<InfallibleTArray<mozilla::CommandInt>*>(aData)->AppendElement(aCommand);
+}
+
 bool TabParent::SendRealKeyEvent(WidgetKeyboardEvent& event)
 {
   if (mIsDestroyed) {
@@ -797,7 +803,30 @@ bool TabParent::SendRealKeyEvent(WidgetKeyboardEvent& event)
   if (!MapEventCoordinatesForChildProcess(&event)) {
     return false;
   }
-  return PBrowserParent::SendRealKeyEvent(event);
+
+
+  MaybeNativeKeyBinding bindings;
+  bindings = void_t();
+  if (event.message == NS_KEY_PRESS) {
+    nsCOMPtr<nsIWidget> widget = GetWidget();
+
+    AutoInfallibleTArray<mozilla::CommandInt, 4> singleLine;
+    AutoInfallibleTArray<mozilla::CommandInt, 4> multiLine;
+    AutoInfallibleTArray<mozilla::CommandInt, 4> richText;
+
+    widget->ExecuteNativeKeyBinding(nsIWidget::NativeKeyBindingsForSingleLineEditor,
+                                    event, DoCommandCallback, &singleLine);
+    widget->ExecuteNativeKeyBinding(nsIWidget::NativeKeyBindingsForMultiLineEditor,
+                                    event, DoCommandCallback, &multiLine);
+    widget->ExecuteNativeKeyBinding(nsIWidget::NativeKeyBindingsForRichTextEditor,
+                                    event, DoCommandCallback, &richText);
+
+    if (!singleLine.IsEmpty() || !multiLine.IsEmpty() || !richText.IsEmpty()) {
+      bindings = NativeKeyBinding(singleLine, multiLine, richText);
+    }
+  }
+
+  return PBrowserParent::SendRealKeyEvent(event, bindings);
 }
 
 bool TabParent::SendRealTouchEvent(WidgetTouchEvent& event)
diff --git a/widget/xpwidgets/PuppetWidget.cpp b/widget/xpwidgets/PuppetWidget.cpp
index 7ddb4d5efb47..b26b7200c632 100644
--- a/widget/xpwidgets/PuppetWidget.cpp
+++ b/widget/xpwidgets/PuppetWidget.cpp
@@ -81,6 +81,10 @@ PuppetWidget::PuppetWidget(TabChild* aTabChild)
   , mDefaultScale(-1)
 {
   MOZ_COUNT_CTOR(PuppetWidget);
+
+  mSingleLineCommands.SetCapacity(4);
+  mMultiLineCommands.SetCapacity(4);
+  mRichTextCommands.SetCapacity(4);
 }
 
 PuppetWidget::~PuppetWidget()
@@ -308,6 +312,36 @@ PuppetWidget::DispatchEvent(WidgetGUIEvent* event, nsEventStatus& aStatus)
   return NS_OK;
 }
 
+
+NS_IMETHODIMP_(bool)
+PuppetWidget::ExecuteNativeKeyBinding(NativeKeyBindingsType aType,
+                                      const mozilla::WidgetKeyboardEvent& aEvent,
+                                      DoCommandCallback aCallback,
+                                      void* aCallbackData)
+{
+  nsTArray<mozilla::CommandInt>& commands = mSingleLineCommands;
+  switch (aType) {
+    case nsIWidget::NativeKeyBindingsForSingleLineEditor:
+      commands = mSingleLineCommands;
+      break;
+    case nsIWidget::NativeKeyBindingsForMultiLineEditor:
+      commands = mMultiLineCommands;
+      break;
+    case nsIWidget::NativeKeyBindingsForRichTextEditor:
+      commands = mRichTextCommands;
+      break;
+  }
+
+  if (commands.IsEmpty()) {
+    return false;
+  }
+
+  for (uint32_t i = 0; i < commands.Length(); i++) {
+    aCallback(static_cast<mozilla::Command>(commands[i]), aCallbackData);
+  }
+  return true;
+}
+
 LayerManager*
 PuppetWidget::GetLayerManager(PLayerTransactionChild* aShadowManager,
                               LayersBackend aBackendHint,
diff --git a/widget/xpwidgets/PuppetWidget.h b/widget/xpwidgets/PuppetWidget.h
index fc31a54eac0e..2db6bc5f2425 100644
--- a/widget/xpwidgets/PuppetWidget.h
+++ b/widget/xpwidgets/PuppetWidget.h
@@ -21,6 +21,7 @@
 #include "nsThreadUtils.h"
 #include "nsWeakReference.h"
 #include "mozilla/Attributes.h"
+#include "mozilla/EventForwards.h"
 
 class gfxASurface;
 
@@ -129,6 +130,28 @@ public:
                                  bool aDoCapture)
   { return NS_ERROR_UNEXPECTED; }
 
+  NS_IMETHOD_(bool)
+  ExecuteNativeKeyBinding(NativeKeyBindingsType aType,
+                          const mozilla::WidgetKeyboardEvent& aEvent,
+                          DoCommandCallback aCallback,
+                          void* aCallbackData) MOZ_OVERRIDE;
+
+  void CacheNativeKeyCommands(const InfallibleTArray<mozilla::CommandInt>& aSingleLineCommands,
+                              const InfallibleTArray<mozilla::CommandInt>& aMultiLineCommands,
+                              const InfallibleTArray<mozilla::CommandInt>& aRichTextCommands)
+  {
+    mSingleLineCommands = aSingleLineCommands;
+    mMultiLineCommands = aMultiLineCommands;
+    mRichTextCommands = aRichTextCommands;
+  }
+
+  void ClearNativeKeyCommands()
+  {
+    mSingleLineCommands.Clear();
+    mMultiLineCommands.Clear();
+    mRichTextCommands.Clear();
+  }
+
   //
   // nsBaseWidget methods we override
   //
@@ -225,6 +248,11 @@ private:
   // The DPI of the screen corresponding to this widget
   float mDPI;
   double mDefaultScale;
+
+  // Precomputed answers for ExecuteNativeKeyBinding
+  InfallibleTArray<mozilla::CommandInt> mSingleLineCommands;
+  InfallibleTArray<mozilla::CommandInt> mMultiLineCommands;
+  InfallibleTArray<mozilla::CommandInt> mRichTextCommands;
 };
 
 class PuppetScreen : public nsBaseScreen