FireFox/Flash update, now streaming Flash/FLV videos do not play

After upgrading to FireFox 13 and Flash, my FireFox no longer plays Flash/FLV or YouTube videos. Spending countless hours installing, reinstalling, searching on the web for resolution, I have to say that I may finally switching to a different browser. This is totally an inexcusable bug either on Mozilla's or Adobe's part. Streaming YouTube or any kind of online video is a must, without it, it's like the internet without search engines.
I develop under 5 other browsers and all the other ones are playing the online videos without a hitch so I'm guessing it's not completely Adobe's error in this issue. Before anyone tries to send me the "try this.." I've tried them all....
1. clear cache, cookies
2. re-installled firefox 3.6.xx, 13 and even the beta 14 versions
3. re-installed shockwave and flash plugins
4. disabled all addons and plugins, starting in safe mode.
5. turned off hardware acceleration in flash settings
* I've pretty much given up, good thing I installed IE Plus so that I can actually run a tab in IE engine and that pulled up the video right away.... what's the point, might as well just use IE.
Too bad, FireFox was "THE" browser, seems to me every new version that comes out from Mozilla, it gets buggier and buggier. This time I have to say, it's a doosie.
Hope everyone is having better luck then me.
Damen

This may be caused by a recent Flash 11.3 update.
See:
*https://support.mozilla.org/kb/keep-flash-up-to-date-and-troubleshoot-problems
*https://support.mozilla.org/kb/flash-crashes-or-does-not-load-firefox-13
*http://forums.adobe.com/thread/1018071?tstart=0
*http://blogs.adobe.com/asset/2012/06/inside-flash-player-protected-mode-for-firefox.html

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