I just learned how to fix this problem. If you have Firefox 10 (or I think it should work on any) then go to options in the drop down menu, click on options then when it comes up click on general. There should be a button that says "restore to default" click upon that and all should be fine

Unfortunately, I've lost my toolbars and the top line. Ever since the quake, I can't fix my page to look correct. The top part is missing. Help!