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Firefox won't open, quit, force quit or finder quit. Help!

I can't open a new window. I can't select preferences. I can't shut it down even when I try to force quit. Going to the finder and shutting down does not work. This p… (read more)

I can't open a new window. I can't select preferences. I can't shut it down even when I try to force quit. Going to the finder and shutting down does not work. This prevents me from shutting down my computer.

Asked by nerakbow 5 years ago

Answered by cor-el 5 years ago

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Updates always create another icon in the dock, and the Mac won't shut down

For the last few updates, Firefox has caused the same issues on all four of our Macs (Pac Pro, MacBook Air, MacBook Pro & Mac Mini). All of them are currently on the… (read more)

For the last few updates, Firefox has caused the same issues on all four of our Macs (Pac Pro, MacBook Air, MacBook Pro & Mac Mini). All of them are currently on the latest OS X (El Capitan 10.11.3). The update appears to install and work, but a second icon appears in the dock. On trying to quit Firefox, it won't quit and then (even worse) the Mac will not close down. 'Shutdown' and 'Restart' do nothing. Force quit shows both versions of Firefox, but neither can be 'force quitted'. The only way to shut down the Mac is to switch it off at the wall. On re-starting the Mac, Apple informs that it was not closed down properly. However, after all this, Firefox then does work properly. I think it is installed correctly in the Applications folder, and I have (on one Mac) completely refreshed Firefox. but this hasn't helped. Is this a known bug, or am I doing something wrong on all four Macs? Thanks, in advance, for your help.


Please also see:

Further details relating to known bug that is under investigation & may cause this #answer-860313 ~J99

Asked by ColBut 4 years ago

Answered by finitarry 4 years ago

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Can't uninstall Firefox as it refuses to quit or force quit

I have read replies to problems similar to mine, but I don't understand most of the things to try. At this point I have 3 Firefox icons on my dock, none of which will lau… (read more)

I have read replies to problems similar to mine, but I don't understand most of the things to try. At this point I have 3 Firefox icons on my dock, none of which will launch the browser. I have been to Applications and tried to uninstall by dragging Firefox to trash and get a message that you can't drag it to trash while open.

Can't quit and therefore can't install. I wanted to reinstall Firefox.

Asked by yankey 4 years ago

Answered by Andrew 4 years ago