in case anyone else is as slow as me.......answer
If one step does not work, go to the next.
1. Restart your computer. Firefox may have not closed completely.
2. Right click the icon you use to Start Firefox. Choose Properties. Click the shortcut tab. Insure the target box does not say " -safe-mode" at the end.
If it does,change it to " C:\Program Files\Mozilla Firefox\firefox.exe "
4. Try opening up FF with all programs.