diff --git a/widget/xpwidgets/nsBaseWidget.cpp b/widget/xpwidgets/nsBaseWidget.cpp
index e95e9431b92..2431113ce70 100644
--- a/widget/xpwidgets/nsBaseWidget.cpp
+++ b/widget/xpwidgets/nsBaseWidget.cpp
@@ -851,7 +851,7 @@ nsBaseWidget::ComputeShouldAccelerate(bool aDefault)
 #endif
 
   // we should use AddBoolPrefVarCache
-  bool disableAcceleration = IsSmallPopup() || gfxPlatform::GetPrefLayersAccelerationDisabled();
+  bool disableAcceleration = gfxPlatform::GetPrefLayersAccelerationDisabled();
   mForceLayersAcceleration = gfxPlatform::GetPrefLayersAccelerationForceEnabled();
 
   const char *acceleratedEnv = PR_GetEnv("MOZ_ACCELERATED");
@@ -992,15 +992,9 @@ void nsBaseWidget::CreateCompositor(int aWidth, int aHeight)
   // deallocated it when being freed.
 }
 
-bool nsBaseWidget::IsSmallPopup()
-{
-  return mWindowType == eWindowType_popup &&
-         mPopupType != ePopupTypePanel;
-}
-
 bool nsBaseWidget::ShouldUseOffMainThreadCompositing()
 {
-  return CompositorParent::CompositorLoop() && !IsSmallPopup();
+  return CompositorParent::CompositorLoop();
 }
 
 LayerManager* nsBaseWidget::GetLayerManager(PLayerTransactionChild* aShadowManager,
diff --git a/widget/xpwidgets/nsBaseWidget.h b/widget/xpwidgets/nsBaseWidget.h
index 52ccba791bd..7e66bc3a073 100644
--- a/widget/xpwidgets/nsBaseWidget.h
+++ b/widget/xpwidgets/nsBaseWidget.h
@@ -324,11 +324,6 @@ protected:
   // if the new rectangles are different from the old rectangles.
   bool StoreWindowClipRegion(const nsTArray<nsIntRect>& aRects);
 
-  // We don't want to accelerate small popup windows like menu, but we still
-  // want to accelerate xul panels that may contain arbitrarily complex content.
-  bool IsSmallPopup();
-
-
   virtual already_AddRefed<nsIWidget>
   AllocateChildPopupWidget()
   {