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Mozilla Firefox disappeared after 'End task' during update

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My Mozilla Firefox have been gone for more than a month now after I 'End task' it using Task Manager while it was updating.

It disappeared from my pinned taskbar and it won't open either via Run 'firefox.exe' it says "Windows cannot find 'firefox.exe'

My Mozilla Firefox have been gone for more than a month now after I 'End task' it using Task Manager while it was updating. It disappeared from my pinned taskbar and it won't open either via Run 'firefox.exe' it says "Windows cannot find 'firefox.exe'

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