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"This profile is in use in another application" but won't open

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Hi! One of my Firefox profiles is listed as "in use," but it's not -- I can't force close or reopen it. (This is all on my Mac laptop.) I tried to create a second profile and sync that frozen profile's bookmarks and history over, but that didn't work. I've restarted my main Firefox browser several times now, and it keeps giving me the same message. This all seemed to start after Firefox unexpectedly quit sometime overnight, so I'm not sure if a software update that forced Firefox to quit maybe caused this. Any help would be greatly appreciated!

Hi! One of my Firefox profiles is listed as "in use," but it's not -- I can't force close or reopen it. (This is all on my Mac laptop.) I tried to create a second profile and sync that frozen profile's bookmarks and history over, but that didn't work. I've restarted my main Firefox browser several times now, and it keeps giving me the same message. This all seemed to start after Firefox unexpectedly quit sometime overnight, so I'm not sure if a software update that forced Firefox to quit maybe caused this. Any help would be greatly appreciated!

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