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.

ابحث في الدعم

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

When I try to start Firefox I get 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.

  • 2 (ردّان اثنان)
  • 13 have this problem
  • 4 views
  • آخر ردّ كتبه Hasan

more options

I get this message when I try to start Firefox after first logging on after turning on the computer.

   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.
Have rebooted. Works when Administrator logs in, just does this in my user profile. Have also re-intalled. Mo change in my User account.
 Firefox was working fine for the last 3 1/2 years.  Any suggestions?
I get this message when I try to start Firefox after first logging on after turning on the computer. 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. Have rebooted. Works when Administrator logs in, just does this in my user profile. Have also re-intalled. Mo change in my User account. Firefox was working fine for the last 3 1/2 years. Any suggestions?

All Replies (2)

more options

Firefox is "hanging at exit" when you exit/quit Firefox.

  1. Stop the Firefox process:
  2. Why Firefox may hang:
  3. Use Firefox Safe Mode to find a problem with an Extension or Plugin:


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.

more options

Firefox is already running but is not responding

Profile in use

Check and tell if its working.