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

Firefox 127.0.2 64 bit on Windows 10 not closing

  • 1 jibu
  • 1 ana tatizo hili
  • 2 views
  • Last reply by SK

SK
SK
more options

I've been out of town. After returning home Firefox updated to 127.0.2 but now it will not close its process when I close its window. When I try to launch Firefox again I get the error message below and attached:

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

When I select "Close Firefox" the new Firefox window will then launch. However, if I open any web page the same error occurs after closing the window.

If I launch Firefox and then close it without opening a web page I do not get the error the next time I launch. Somehow going to any web page in Firefox prevents that instance of Firefox from closing.

I'm running Windows 10 22H2 Build 19045.4529 and it's shown as up-to-date.

I've been out of town. After returning home Firefox updated to 127.0.2 but now it will not close its process when I close its window. When I try to launch Firefox again I get the error message below and attached: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window. <Close Firefox> <Cancel>" When I select "Close Firefox" the new Firefox window will then launch. However, if I open any web page the same error occurs after closing the window. If I launch Firefox and then close it without opening a web page I do not get the error the next time I launch. Somehow going to any web page in Firefox prevents that instance of Firefox from closing. I'm running Windows 10 22H2 Build 19045.4529 and it's shown as up-to-date.
Attached screenshots

All Replies (1)

SK
SK Mwenye swali
more options

OK, I found the fix. I signed out from my Firefox profile, then signed in again. It appears to have been an issue with re-syncing devices after the latest update.

Helpful?

Uliza swali

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.