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Firefox won't open

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After exiting Firefox, if I try to go back in, it says that Firefox is running, but not responding, and I have to go into Task Manager and close the process for it to work again. This problem isn't fixed by restarting my computer.

After exiting Firefox, if I try to go back in, it says that Firefox is running, but not responding, and I have to go into Task Manager and close the process for it to work again. This problem isn't fixed by restarting my computer.

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You should see Firefox hangs or is not responding - How to fix. The section "Hangs at exit" should solve your problem