--- a/gfx/layers/basic/BasicCanvasLayer.cpp
+++ b/gfx/layers/basic/BasicCanvasLayer.cpp
@@ -23,19 +23,23 @@ namespace layers {
 void
 BasicCanvasLayer::Paint(DrawTarget* aDT,
                         const Point& aDeviceOffset,
                         Layer* aMaskLayer)
 {
   if (IsHidden())
     return;
 
-  FirePreTransactionCallback();
-  UpdateTarget();
-  FireDidTransactionCallback();
+  if (IsDirty()) {
+    Painted();
+
+    FirePreTransactionCallback();
+    UpdateTarget();
+    FireDidTransactionCallback();
+  }
 
   if (!mSurface) {
     return;
   }
 
   Matrix oldTM;
   if (mNeedsYFlip) {
     oldTM = aDT->GetTransform();