said by Grail Knight:Did you start Fx in Safe Mode and see if the issue remains?
I have heard of this issue caused by 3rd Party Themes that have not been updated or are forced to work in a non-supported version of Fx.
Also what version of Fx are you using?
Opps forgot to tell you I am using version 12.0. Their is no safe mode for firefox on my start menu. I installed the default theme and it seems like it is better.