In as3, if I set stage.scaleMode = StageScaleMode.SHOW_ALL right before fullscreen, and stage.scaleMode = StageScaleMode.NO_SCALE on exit fullscreen, the contextMenu is not woking in fullscreen mode. This issue never happens on IE. Steps: 1. run the following app 2. click the fullscreen button 3. press ESC to exit fullscreen 4. click the fullscreen button again. 5. right click your mouse expect result: contextMenu shows and is selective(working good) actual result: contextMenu shows but is not working as3 code: <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Script> <![CDATA[ public function listenFullScreenClick(event:MouseEvent):void { stage.scaleMode = StageScaleMode.SHOW_ALL; try { stage.addEventListener(FullScreenEvent.FULL_SCREEN, handleFullScreen); stage.displayState = StageDisplayState.FULL_SCREEN; } catch(e:SecurityError) { stage.scaleMode = StageScaleMode.NO_SCALE; } } private function handleFullScreen(event:FullScreenEvent):void { if(event.fullScreen) { } else { stage.removeEventListener(FullScreenEvent.FULL_SCREEN, handleFullScreen); stage.scaleMode = StageScaleMode.NO_SCALE; } } ]]> </mx:Script> <mx:Button label="FullScreen" click="listenFullScreenClick(event)" /> </mx:Application>