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have mozilla loaded on my pc but i cannot open it. then i try to download it again and i'm told to close the mozilla application, but it is not open

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cannot open firefox. tried to download a new version but a pop up message appears telling me to close firfox, but it is not open.

cannot open firefox. tried to download a new version but a pop up message appears telling me to close firfox, but it is not open.

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Mozilla Firefox might be running in the background since it did not close properly the last time. See if the solutions given in this article help to solve your problem: "Firefox is already running but is not responding" error - How to fix.