Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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 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 replies
  • 24 have this problem
  • 5 views
  • Last reply by fireater17

more options

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.

This message comes up when I try to open firefox. I have looked at all the siggestions on the web and thothing works. I have gone in to task manager and it is not running. I even removed it and re-instaled it. No luck. I just had an new update download to the computer before I shut down last and I am now runing Windows 7 Home Premium 64 bit.

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. This message comes up when I try to open firefox. I have looked at all the siggestions on the web and thothing works. I have gone in to task manager and it is not running. I even removed it and re-instaled it. No luck. I just had an new update download to the computer before I shut down last and I am now runing Windows 7 Home Premium 64 bit.

All Replies (2)

more options
more options

Thank you I will look at those and see if that fixes it.