Ok so I've been using my mac for a few months now, and its been great... no major problems... I left my mac on last night and shut the lid, opened it this morning and went to watch some youtube videos in firefox...but the flash wouldn't load. I figured it was just you tube, but i tested it in Safari and they loaded just fine. I restarted my mac, and now when I try to start firefox, the little icon will hop a few times, then stop. I try to open it again, same thing. I load safari and go on one of my sites and now flash is no longer installed in safari either. Youtube or anywhere... flash is gone after the reboot and firefox won't start. Any idea what is going on or how to fix it?? I have a bunch of work to finish and this is killing me. Is there a roll-back feature or something in mac?