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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… (læs mere)

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

Stillet af ColBut for 5 år siden

Besvaret af finitarry for 5 år siden

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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… (læs mere)

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.

Stillet af yankey for 5 år siden

Besvaret af Andrew for 5 år siden

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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… (læs mere)

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.

Stillet af nerakbow for 6 år siden

Besvaret af cor-el for 6 år siden