Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox quit working on my machine

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by Terry

bil3
bil3
more options

All of a sudden Firefox won't load. I get this message ...

"Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window."

There is no other window open and I still get this message. I've uninstalled and reinstalled it and I still get this message when the program won't load.

Help!

Bil. Alvernaz bil@alvernaz.com

All of a sudden Firefox won't load. I get this message ... "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." There is no other window open and I still get this message. I've uninstalled and reinstalled it and I still get this message when the program won't load. Help! Bil. Alvernaz bil@alvernaz.com

All Replies (2)

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

If the message says that Firefox is still open, look at task manager. Anything there? What version of Firefox?

Modified by jonzn4SUSE

Terry
Terry
more options

You may need to delete a lock file.

https://support.mozilla.org/en-US/kb/Firefox-already-running-not-responding