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Why doesn't Firefox stop running when I shut it off? Every time I shut it off and return later, I get a message that Firefox is running, but not responding and that I have to restart my computer to access Firefox.

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When I shut down Firefox I get all the shutdown messages, so I assume it has shut down as it should. But if I go back to my PC later (within an hour or so) and click on Firefox to bring it up, I get the "runningbutnotresponding" message and the promt to restart my PC.

When I shut down Firefox I get all the shutdown messages, so I assume it has shut down as it should. But if I go back to my PC later (within an hour or so) and click on Firefox to bring it up, I get the "runningbutnotresponding" message and the promt to restart my PC.

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