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

Ova tema je arhivirana. Pitajte drugo pitanje ako vam je potrebna pomoć.

Firefox not opening

  • 1 odgovor
  • 1 ima ovaj problem
  • 2 views
  • Posljednji odgovor poslao FredMcD

pauldasilva555
pauldasilva555
more options

Hi, all of a sudden the Firefox app doesn't work on my pc. An error shows up saying "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window". Have tried uninstalling it, removing the Firefox folders, refreshing it and changing the profiles but nothing works. Any other suggestions?

Hi, all of a sudden the Firefox app doesn't work on my pc. An error shows up saying "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window". Have tried uninstalling it, removing the Firefox folders, refreshing it and changing the profiles but nothing works. Any other suggestions?

All Replies (1)

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