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Firefox on my Mac will not open!!!!!

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Buffy
Buffy
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I'm on a late 2013 iMac, running Catalina OS.

I've tried all of the online fixes so far, including restarting multiple times, deleting and reinstalling the app, using Terminal to create a new profile (more on that below)... I can't remember what else.

Now when I try to open Firefox, the app bounces in the dock for about a minute, then stops WITHOUT the dot underneath to indicate that it's open, but when I open the Force Quit menu, it's there in red with the words "(not responding)". So I have to force quit. The same thing happens trying to open it in Safe mode.

When I try and use Terminal to create a new profile, so that I can delete the old one maybe causing problems, somewhere in that process the mac "spinning wheel of death" starts going and I again have to force quit the app and lose any changes.

Safari is working fine (that's what I'm using now), so I may have to switch to Safari, though I like the privacy and protection offered by Firefox. But this is not the first time I've had problems with getting Firefox to open and run correctly, and I feel like I'm at the end of my rope trying to trouble shoot.

Any help would be appreciated.

I'm on a late 2013 iMac, running Catalina OS. I've tried all of the online fixes so far, including restarting multiple times, deleting and reinstalling the app, using Terminal to create a new profile (more on that below)... I can't remember what else. Now when I try to open Firefox, the app bounces in the dock for about a minute, then stops WITHOUT the dot underneath to indicate that it's open, but when I open the Force Quit menu, it's there in red with the words "(not responding)". So I have to force quit. The same thing happens trying to open it in Safe mode. When I try and use Terminal to create a new profile, so that I can delete the old one maybe causing problems, somewhere in that process the mac "spinning wheel of death" starts going and I again have to force quit the app and lose any changes. Safari is working fine (that's what I'm using now), so I may have to switch to Safari, though I like the privacy and protection offered by Firefox. But this is not the first time I've had problems with getting Firefox to open and run correctly, and I feel like I'm at the end of my rope trying to trouble shoot. Any help would be appreciated.