I have uninstalled and reinstalled the current (as of 6/22/13) flash plugin for Firefox. I also have turned off hardware acceleration but my flash player keeps crashing on every youtube video I try. Crash reports With Hardware Acceleration: https://crash-stats.mozilla.com/report/index/929ae2cc-b007-4dee-900f-a66fc2130623 Without: https://crash-stats.mozilla.com/report/index/ca2d2983-77b4-4ccf-a271-9e48c2130623 Also Firefox just stopped responding when I allowed the troubleshooter, but it did give information after restoring my previous session.