-> Close Firefox

• click Firefox button and click Exit (OR File Menu -> Exit)
• OR press CTRL + ALT + DEL keys to open Task Manager -> Processes tab -> right-click firefox.exe and click End Process Tree -> close Task Manager

-> Start Firefox in Safe Mode by holding down SHIFT key while starting Firefox

• As an alternative method, use Win + R key combination and enter one of the following in the Windows Run box:
  • firefox -safe-mode
  • "C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode
  • "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -safe-mode

-> Firefox Safe Mode window will appear -> DON'T SELECT ANY OPTIONS, just click Continue in Safe Mode

Check and tell if its working while you are using Firefox Safe Mode.

Troubleshooting extensions and themes

• https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

http://kb.mozillazine.org/Firefox_crashes

Starting in safe mode did not change the behavior. Still crashes immediately.

Update Firefox to 7.0.1

• Update Firefox to the latest release

Check and tell if its working.

Upgrading to 7.0.1 did not fix this issue. Turns out it was this bug: https://bugzilla.mozilla.org/show_bug.cgi?id=680927

Fixed it with the workaround in comment 34 in the link above.

See:

• bug 680927 NEW Startup crash in mozcomp.dll with Oracle Enterprise, F5 Networks, Passlogix V-GO, IBM Tivoli Access Manager SSO

(please do not comment in bug reports)