This will show you how to repair Firefox safe mode so you can get it working properly the way it used to be.
Repair Firefox Safe Mode
So, the fire thing you need to do is start Firefox in Safe Mode. To do that you need to go to Help and click on "Restart with Add-ons Disabled". (another way to do this is to hold down the shift key while you start firefox fix).
After you restart firefox in safemode you'll see the following text box:
Once you click on of the possible problems you can click "make changes and restart." If you do this you might be able to diagnose the fire fox problem.A detailed explanation can also be found on the mozilla firefox homepage: http://support.mozilla.org/en-US/kb/Firefox%20is%20stuck%20in%20Safe%20Mode
