you might want to do a bookmark backup so you have them saved somewhere else on the computer just in case they all mess up.

I backed up, and exported, all of bookmarks to IE and Opera {just downloaded Opera yesterday because of this}.

I tried the fixes from the Mozilla site but none of them helped.
So after I backed up and exported my bookmarks to both other browsers.
I tried to re download FF but it kept coming up as corrupted...

so I tried a system restore which it said it couldn't do either ... so i was wondering what the heck, is going on.

but after the sys restore did it's reboot and told me it didn't do a restore- then everything was working normally again LOL.
So either way it seems to be fixed
and just to be sure there was no other problems ,I ran 2 scanners and my reg cleaners.

crazy machines LOL.