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Firefox won't force quit. I have tried hard and soft restarts, but the Firefox app stops the computer from carrying out command as Firefox won't close.

  • 7 replies
  • 8 have this problem
  • Last reply by guigs

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Using a Macbook Pro with Yosemite OS X. Firefox app won't 'force quit'. I have tried hard and soft restarts, but the Firefox app stops the computer from carrying out command as Firefox won't close. I can't update the Firefox software as the current Firefox app is still open, or delete the app, for the same reason. Cannot use Firefox in Safe Mode (a route to a possible solution in other threads) because I can't access the Firefox menu. Also, can't update Mac software, as it requires a restart, and the technically open Firefox app will prevent this. Help?

All Replies (7)

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Can you confirm that you've tried selecting "Force Quit…" from the Apple menu. You can also access Force Quit by holding Option+Command+Escape. You might have to switch to another application to access the Apple menu.

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Yes, tried 'Force Quit' via Apple Menu and option+command+escape. By the way, the Activity Monitor does not show Firefox as running, although the 'Force Quit' menu shows it is. Used the Terminal Command 'top' as a means of finding and closing it, but again it is not in the list of programs running.

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I notice that the Firefox app was modified last night (which I assume might be an automatic update, as I didn't do this manually). Could this be a factor? Has anyone else had issues with latest Firefox updates?

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I also have this problem. About half the time when I try to shut down the system just hangs because the system sees Firefox as open.

If I go right to the program in the App folder and double click on FireFox it tells me: The Application "" is not open anymore.

If I install a new copy of FIrefox, it will run normally but the original Firefox is still on the doc as open and I cannot shut down. BTW, I've been migrating to Chrome because of this problem.

Modified by MRNTK

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I've called the big guys to help you. Good luck.

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I checked the open "Firefox" files and there are only two. and: /Users/.../Library/Preferences/org.mozilla.firefox.plist by: cfprefsd

relaunching the Finder closes, but does not free up the program to be run or remove the open indicator from the dock.

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Instead of moving it from the doc, in the Finder menu can you delete these files: trash the "Firefox" folder, located here: ~Library/Application Support/Firefox ?