Firefox Crash

FF was ok and suddenly it stop working.
I delete every folder containing mozilla and firefox and reinstall FF 3.6. I still have the same problem.
I click the icon it would bounce and then disappear.
Any help?

What about the hidden mozilla folder?

In a terminal copy and paste this:

mv .mozilla .mozilla-bak

I resolved the problem
I removed a file that appear as a shortcut

/usr/lib # rm -r libgnomeui-2.so.0