Constant tab crashing.
Tried reset, reinstall, use older version, full install, registry deletions, etc. multiple times. I also used Malewarebytes but nothing reported. Firefox is my favorite browser and is now unusable. I completely uninstalled it, so I cannot use the troubleshooter below.
Chosen solution
In another thread, a user reported this problem could be caused by Bitdefender:
https://support.mozilla.org/questions/1280327
I haven't looked at Bitdefender's support pages to see whether this is a known issue with a workaround.
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Hi dlococo, sorry to hear about this problem.
You mention trying different versions. Do you recall when this problem started? For reference, Firefox 73.0 was released last Tuesday, and Firefox 73.0.1 was released this Monday/Tuesday.
Your Firefox may have logged some data that would help track down the cause of the problem. You can submit that data to Mozilla and share it with forum volunteers to see whether it points to the solution. Please check the support article "Firefox crashes - asking for support" for steps to get those crash report IDs from the about:crashes page -- or, if you can't run Firefox but you didn't remove the data folders, from files on disk -- and then post some of the recent ones here.
Chosen Solution
In another thread, a user reported this problem could be caused by Bitdefender:
https://support.mozilla.org/questions/1280327
I haven't looked at Bitdefender's support pages to see whether this is a known issue with a workaround.
I turned off Bitdefender, reinstalled Firefox and everything worked! Next stop is Bitdefender support. Thanks for your help!!