Your crashreport:<br> https://crash-stats.mozilla.com/report/index/bp-9b01edaa-f8fb-4aad-b96c-bad812111102<br> Firefox 7.0.1 Crash Report [@ nsComponentManagerImpl::GetServiceByContractID(char const*, nsID const&, void**) ] <br> This may be related to [http://www.trusteer.com/product/trusteer-rapport Trusteer Rapport]. Try to disable it and see if that stops the crashing. For more help you can ask their helpdesk.<br> http://www.trusteer.com/support/en/report-problem<br> According to the user in question [http://support.mozilla.com/nl/questions/892517 892517] Trusteer is aware of the problem and working on a fix. You can stop Rapport using Start Menu > Programs > Trusteer Rapport > Stop Rapport<br>