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.

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.

I get the following message Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system. but can't close the program without rebooting

  • 1 reply
  • 4 have this problem
  • 1 view
  • Last reply by cor-el

AnonymousUser
AnonymousUser
more options

Can't close Firefox in windows 7 without rebooting

This happened

Not sure how often

== After upgrading to 3.6.3

Can't close Firefox in windows 7 without rebooting == This happened == Not sure how often == After upgrading to 3.6.3

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

See http://kb.mozillazine.org/Firefox_hangs and Firefox hangs or is not responding - How to fix (Hang at exit)