Hmm, it does look a little washed out... but i wouldn't call it insane.
try clearing your cache, history and cookies, then restarting the browser and refreshing the page, that might work. other than that, it could be an issue with your installation (these things go spaz after a while). try re-installing the latest firefox.
Which brings me to another point. when did this happen? was it an official update to ff, or was it an add-on update. if so, was the addon anything to do with firefox's GUI, etc, etc, etc