Can not view videos on you tube in firefox4 using flash player11
I can't believe you're still running Firefox 4. Why not a newer version?
There are a number of active threads concerning the latest Flash player plugin (11.3) and the latest Firefox (12-13). Not all users are experiencing the same issues, but things to check include the following:
- Conflict with Realplayer Browser Record plugin (to disable this, open Add-ons from the orange Firefox button or the classic Tools menu and look under the Extensions and Plugins categories)
- Conflict with Flash 11.3 Protected Mode (see [http://forums.adobe.com/thread/1018071?tstart=0 Adobe Forums: How do I disable Flash Player's protected mode for Firefox?])
Scanning down the front of the forums probably will yield additional suggestions: https://support.mozilla.org/en-US/questions
Does any of that appear promising?