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. Adobe and Mozilla are working closely to diagnose and address these issues. In the meantime, Firefox users experiencing problems viewing videos in Flash Player should try the workarounds listed in this help article. We will post an update on this blog once that happens.
About the Author
Justin is the Product Manager for Marketplace & Add-ons at Mozilla.