--- a/mobile/android/base/ui/SimpleScaleGestureDetector.java
+++ b/mobile/android/base/ui/SimpleScaleGestureDetector.java
@@ -35,16 +35,17 @@ import java.util.Stack;
  *
  *   - It doesn't take pressure into account, which results in smoother scaling.
  */
 public class SimpleScaleGestureDetector {
     private static final String LOGTAG = "GeckoSimpleScaleGestureDetector";
 
     private SimpleScaleGestureListener mListener;
     private long mLastEventTime;
+    private boolean mScaleResult;
 
     /* Information about all pointers that are down. */
     private LinkedList<PointerInfo> mPointerInfo;
 
     /** Creates a new gesture detector with the given listener. */
     public SimpleScaleGestureDetector(SimpleScaleGestureListener listener) {
         mListener = listener;
         mPointerInfo = new LinkedList<PointerInfo>();
@@ -201,19 +202,29 @@ public class SimpleScaleGestureDetector 
     /** Returns true if the scale gesture is in progress and false otherwise. */
     public boolean isInProgress() {
         return getPointersDown() == 2;
     }
 
     /* Sends the requested scale gesture notification to the listener. */
     private void sendScaleGesture(EventType eventType) {
         switch (eventType) {
-        case BEGIN:     mListener.onScaleBegin(this);   break;
-        case CONTINUE:  mListener.onScale(this);        break;
-        case END:       mListener.onScaleEnd(this);     break;
+        case BEGIN:
+            mScaleResult = mListener.onScaleBegin(this);
+            break;
+        case CONTINUE:
+            if (mScaleResult) {
+                mListener.onScale(this);
+            }
+            break;
+        case END:
+            if (mScaleResult) {
+                mListener.onScaleEnd(this);
+            }
+            break;
         }
     }
 
     /*
      * Returns the pointer info corresponding to the given pointer index, or null if the pointer
      * isn't one that's being tracked.
      */
     private PointerInfo pointerInfoForEventIndex(MotionEvent event, int index) {