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.

close firefox

adtmccabe
adtmccabe
more options

Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window, this happens all the time, how can I get rid of it please

Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window, this happens all the time, how can I get rid of it please

All Replies (2)

FredMcD
FredMcD
more options

https://support.mozilla.org/en-US/kb/firefox-already-running-not-responding

https://www.basezap.com/cant-open-firefox-because-a-copy-of-firefox-is-already-open-mac/

https://apple.stackexchange.com/questions/196771/cant-open-firefox-because-a-copy-of-firefox-is-already-open

http://kb.mozillazine.org/Firefox.exe_always_open

Shashank Shekhar
Shashank Shekhar
more options

Hi adtmccabe,

See this:- https://support.mozilla.org/en-US/kb/firefox-already-running-not-responding