Gah-Your-tab-just-crashed https://support.mozilla.org/en-US/kb/firefox-crashes-troubleshoot-prevent-and-get-help

We have recently seen multiple reports that Bitdefender is causing issues with tab crashes in Firefox 73.

It looks that Bitdefender has pushed an update to address this issue 21 Feb 2020

I followed that article to the last step: "Finally, click the Post Question button." that led me here.

Boot the computer in Windows Safe Mode with network support to see if that has effect.

• https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• https://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

Same here. Many issues since upgrading to V82.0.3

Logins not working, sites not responding to inputs, or locking. Not every site - just one here and there.

We badly need V83.0.0. Is there any way to migrate back to the previous version?

Install Older Version Of Firefox {web link} Be sure to read everything here.

If you still want to downgrade, look under; I still want to downgrade. Click the Directory of other versions and languages link. Look for the directory of the version that you want. But, remember that old versions may have security issues.

You should also check out Firefox; Extended Support Release {web link} ESR Notes System Requirements

I closed every other app and restarted Firefox, but it still had the problem. I rebooted the PC a few hours and it has been normal since then. Not sure why rebooting the PC helped.

Could be many possibilities. As long as it works.

Please flag your last post as Solved Problem as this can help others with similar problems.