We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

Install Firefox in/on Windows 11 Pro PC

  • 1 reply
  • 0 have this problem
  • 12 views
  • Last reply by Terry

kaplanken
kaplanken
more options

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

(1) How do I delete/remove all traces of Mozilla Firefox from my PC?

(2) How do I correct the above error message?

(3) How do I install the current version of Mozilla Firefox?

Thanks, Ken

Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window. (1) How do I delete/remove all traces of Mozilla Firefox from my PC? (2) How do I correct the above error message? (3) How do I install the current version of Mozilla Firefox? Thanks, Ken

All Replies (1)

Terry
Terry
more options

There are support articles.

https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer https://support.mozilla.org/en-US/kb/Firefox-already-running-not-responding https://support.mozilla.org/en-US/kb/how-install-firefox-windows

https://www.mozilla.org/firefox/all/#product-desktop-release