You seem to be using Trusteer Rapport. That program has been reported to cause crashes in Firefox. *http://www.trusteer.com/support/rapport-installation-links *http://www.trusteer.com/support/en/report-problem *http://kb.mozillazine.org/Firefox_crashes#Trusteer_Rapport You can try to stop Trusteer Rapport if installing the latest version doesn't help. Start Menu > Programs > Trusteer Rapport > Stop Rapport See also: *http://kb.mozillazine.org/Firefox_crashes *https://support.mozilla.org/kb/Firefox+crashes