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.

Firefox keeps saying it is already open, to restart computer; but it is NOT open, and resarting computer doesn't help.

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

WhittierMark
WhittierMark
more options

All of a sudden I can't open Firefox. Every time I try, I get a pop-up that says to the effect that Firefox is already open and running, and I need to either close it or restart the computer. It is NOT open, so there is nothing I can close; and restarting the computer doesn't help.

All of a sudden I can't open Firefox. Every time I try, I get a pop-up that says to the effect that Firefox is already open and running, and I need to either close it or restart the computer. It is NOT open, so there is nothing I can close; and restarting the computer doesn't help.

All Replies (2)

Michael Verdi
Michael Verdi
more options

Look at the other (other than restarting) solutions in this article - "Firefox is already running but is not responding" error - How to fix

Hasan
Hasan
more options

Also see this - Profile in use

Check and tell if its working.