YouTube gives the option of using HTML5 try that as a workaround. * http://www.youtube.com/html5 Note Flash 11.3 on Firefox Windows has been causing problems for a couple of weeks,some users have needed to downgrade to Flash 11.2 or the secure FlashPlayer 10.3 Developers from Firefox & Flash are apparently supposed to be working on the issue. ----------- Useful links, for those wishing to know more about the current problems with FlashPlayer, especially when using FlashPlayer 11.3 and possibly other downloading or recording software * [[flash 11.3 crashes]] * [[fix problems with RealPlayer add-ons]] * [[Flash 11.3 doesn't load video in Firefox]] * These are very good, accurate and the latest information. But written for users with some prior knowledge ** http://kb.mozillazine.org/Flash#Flash_Player_11.3_Protected_Mode_-_Windows ** http://kb.mozillazine.org/Flash#Disabling_Protected_Mode_in_Flash_11.3 ** http://kb.mozillazine.org/RealPlayer#Flash_11.3_issues * Other links ** http://forums.adobe.com/thread/1018071?tstart=0 **http://blogs.adobe.com/asset/2012/06/inside-flash-player-protected-mode-for-firefox.html * '''and a general one''' [[Flash Plugin - Keep it up to date and troubleshoot problems]] <br/> BUT note leaving Flash Player up-dates turned on, or following plugincheck advise may recreate the problem if you do have Flash 11.3 issues