Try upgrading to the latest version of firefox if possible using "yum upgrade firefox". Do you have any additional Firefox plugins installed? If so you may have to disable some or all of them, and enable them one by one to see which one is causing the issue.
sudo yum install firefox
Loaded plugins: dellsysidplugin2, priorities, refresh-packagekit
Setting up Install Process
Package firefox-3.5.3-1.fc11.x86_64 already installed and latest version
Nothing to do
i am on the latest version. Firefox freezes the screen before it's even fully up so i can't change any firefox settings
Although you'll lose your bookmarks, settings, etc., have you tried deleting (better mv'ing to a new name) your .mozilla directory and forcing the creation of a new one?
You can try starting Firefox in safe mode: /path/to/firefox/firefox -safe-mode . See if that gets it to at least start up for you so that you can check the plugins, etc.
Ok starting it in safe mode worked. I got the message that firefox was now updated to the latest version. all add-ons and plugins were disabled anyway in safe mode.
restarted firefox normally and now it seems to be ok!!
Firefox startup crashes Fedora
Linear Mode
