There are many issues with the recently released Flash 11.3. Unfortunately at this point, we are waiting on Adobe to release a fix for this. You can read the below articles to try to find a workaround for the issue though. [[Flash Plugin - Keep it up to date and troubleshoot problems]] [[Flash 11.3 crashes]] [[Flash 11.3 doesn't load video in Firefox]] Other, more technical information about these issues can be found under these Links: http://forums.adobe.com/thread/1018071?tstart=0 http://blogs.adobe.com/asset/2012/06/inside-flash-player-protected-mode-for-firefox.html Please tell us if this helped!