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Firefox crashes, does not even start.


When I try to start Mozilla Firefox it crashes. A crash report shows when I try to start it. I can't even start Firefox in safe mode. I has also tried to restart my computer, just in case..

Krasch-ID: bp-69e0d1ba-83e4-4df4-b4ea-802732130311

Additional System Details


  • User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)

More Information

Tyler Downer
  • Administrator
  • Moderator
1165 solutions 6641 answers

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

Dwainessa 0 solutions 3 answers

Helpful Reply

Uninstall and reinstall Firefox. Please let us know if this solves your concern.

  • Top 10 Contributor
  • Moderator
10761 solutions 96857 answers

Helpful Reply

Be sure to delete the Firefox program folder before reinstalling Firefox.

  • (32 bit Windows) C:\Program Files\Mozilla Firefox\
  • (64 bit Windows) C:\Program Files (x86)\Mozilla Firefox\

Your bookmarks and other profile data are stored in the Firefox Profile Folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.

If you keep having problems then also create a new profile.

Question owner

First I tried to scan for malware, but nothing was found. So I uninstalled and reinstalled Firefox. So now Firefox works again. Thanks for the help!