OKAY - IMPORTANT FOR MAC USERS: you gotta delete your username/library/application support/firefox/profiles
folder as well as your username/library/preferences/org.mozilla.firefox.plist
I seem to be GOOD TO GO NOW.
perhaps I only needed to have done that? instead of removing and then re-installing the whole thing?
I think I'll go use Opera instead.
Sorry for the trouble. You're probably thinking I was just screwing with you, but I honestly did read that on another forum, but your results show that there was a different cause of the problem, obviously. I hope it didn't cause you to lose any bookmarks or extensions.
Now ditch the mac and get a real computer.