http://www.v3.co.uk/v3-uk/news/2185241/mozilla-firefox-users-left-waiting-flash-player-fix
Mozilla Firefox users left waiting for Flash Player fix
"Some Firefox users on Windows Vista and Windows 7 are experiencing problems when viewing videos in Adobe Flash Player
11.3, released on June 8, 2012. Firefox and/or Flash Player may crash or not load videos using Flash Player, or videos may not display correctly," a Mozilla spokesman told V3.
"Adobe and Mozilla are working closely to diagnose and address these issues."
"Firefox users experiencing problems viewing videos in Flash Player should try the workarounds listed in this help article," Mozilla said in the statement.