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"Firefox already open" msg prevents launching browser

Posted

Using with OS 10.12.6 Tried using Refresh Firefox, then was unable to open the browser, with a message "Close Firefox" indicating the a copy as already open. I have tried rebooting, deleting and reloading Firefox, opening in Safe mode, etc, without success.

Help!

Using with OS 10.12.6 Tried using Refresh Firefox, then was unable to open the browser, with a message "Close Firefox" indicating the a copy as already open. I have tried rebooting, deleting and reloading Firefox, opening in Safe mode, etc, without success. Help!

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/603.3.8 (KHTML, like Gecko) Version/10.1.2 Safari/603.3.8

More Information

FredMcD
  • Top 10 Contributor
4260 solutions 59653 answers
What's your Firefox version? https://support.mozilla.org/kb/Firefox+is+already+running+but+is+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