You probably realise Firefox's [[safe mode]] does not disable plugins. Creating a new profile would get round that but you have tried that. When you tried reinstalling did you try a clean reinstall: # First of all copy your profile somewhere safe, outside Firefox Profile or program paths, maybe Windows Desktop see [[backing up your information]] #Delete the Firefox program folder & files see [[Basic Troubleshooting#w_7-reinstall-firefox]]_7-reinstall-firefox # Restart the computer and check that the deletion worked, and has not been reversed by any security or backup software. # Reinstall Firefox, your crashes are probably on or close to startup, you will need to use another browser such as IE to download the Firefox Installer file. (Do not try to restore from any Windows etc restore copy you may have) I am assuming you have already read and tried the updates etc recommended as troubleshooting steps in [[firefox crashes]] . It is also worth scanning for malware with more than one up-to-date tool as suggested in this post [/questions/914980#answer-302372] If a clean re-install fails then this is a top crasher, ([https://crash-stats.mozilla.com/topcrasher/byversion/Firefox/11.0/7 currently#40]) if no one else has filed a bug for it by then I suggest you do so yourself. You may wish to use a disposable webmail address to register with bugzilla. You will see the link for bug filing in the Crash reports. ------------- Your reports for some of the CrashIDs * [https://crash-stats.mozilla.com/report/index/59e7329a-90a3-4d18-8d19-852422120404 59e7329a-90a3-4d18-8d19-852422120404] * [https://crash-stats.mozilla.com/report/index/36851420-7e27-4640-8ea2-8ab372120404 36851420-7e27-4640-8ea2-8ab372120404] *[https://crash-stats.mozilla.com/report/index/62921c29-8781-4608-a570-b42162120404 62921c29-8781-4608-a570-b42162120404] *[https://crash-stats.mozilla.com/report/index/d85fb4a8-53b1-4f95-983e-01d7e2120409 d85fb4a8-53b1-4f95-983e-01d7e2120409] * Crash Signature: _PR_MD_PR_POLL | PR_GetHostByAddr