Have you just installed or upgraded to Windows 8 and Mozilla Firefox keeps crashing? That’s what happened to me. I had the latest version of Firefox, 14.0.1, the newest version of Flash, Shockwave, etc.
Firebug, Xmarks, Lastpass, etc. all still work fine. If you are having trouble with Firefox crashing, try grabbing the newest Beta. I have a feeling they have been testing a little now in Windows 8.