Originally Posted by Mr. Blue

Jace when you uninstalled and reinstalled it, did you still have your bookmarks, etc, present? If so you might have a corrupt profile and that might be causing the crashes. Shut off firefox (you might have to windows task manager>processes and make sure firefox isn't running in the background). Then go to start>run>and type in firefox.exe -p

That'll open up your profile manager, create a new one, and log into it. If it works move the necessary files to the new profile name (so you have the bookmarks, etc) and then delete the old profile. This happened on my firefox a bit ago...that's the only thing I can think of off the top of my head.