Hi, if you haven't turned off the hardware acceleration feature then I would suggest you do that. Go to youtube and as soon as the video starts, right click on it and you should see a Display Setting; UNcheck the hardware acceleration.
It is also recommended to update your graphic and video drivers to the latest versions. You may see an improvement by just turning off the hardware acceleration feature.
See if this helps.
I have the latest video drivers.
I went to YouTube and turned off hardware acceleration as you said.. does that do it for all websites? Because the first website I went to, which is a chat site with video says "The Adobe Plugin Has Crashed" and I can send a report. Also, I went to a game website, armorgames.com, and there was a popup window.. in that window it had the plugin has crashed message.
Hi, well I went to Firefox and you can see what I searched for and the search result was 1,001 results for "Flash Player with 3.6.6" I read a few of the results and the users are not happy. They have tried everything, don't want vs 3.6.4 or 3.6.6.
Firefox 4 beta is out. http://www.mozilla.com/en-US/firefox/beta/
Another thread was having the same problem or worse. He Uninstalled Flash Player 10.1, Installed with the offline Installer, Installed the Firefox 4 beta and last report no crashes and he also turned off the hardware acceleration.
I know some users on the forum here went back to Firefox 3.6.3.
I don't use FF, so can't suggest anything other than info.
Hope you get it solved.