This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox 6 has crashed, and corrupted a script file in Applications Data. The result , everytime i try and start Firefox, it says its already running, but it isnt. I have tried rebooting system, removing firefox ,reinstalling and still the problem exists.

  • 2 replies
  • 2 have this problem
  • 2 views
  • Last reply by Hasan

more options

It would appear that the corrupted script files are sessionstore.js or prefs.js. these i found in Application Data/Mozilla/Firefox/Profiles/2xewu6aw.default folder

It would appear that the corrupted script files are sessionstore.js or prefs.js. these i found in Application Data/Mozilla/Firefox/Profiles/2xewu6aw.default folder

All Replies (2)

more options

You may also have a lock file in your default folder after a crash. Then Firefox will say "already running". If you delete the lock file then Firefox should start again.

more options

Firefox is already running but is not responding

Check and tell if its working.