Why are you running the beta version instead of the stable release version?

I think most of our computers automatically updated to the beta version. Is there a way to disable that? I'll revert one of the problem PCs to the current stable version and report back. Thanks, Stans.

Hello there Ssantos We have read your message We try to help you.

https://support.mozilla.org/en-US/kb/thunderbird-crashes

Take one of us 78.0 version English edition. https://www.thunderbird.net/en-US/thunderbird/all/

Greetings Firefox Volunteer

Thank you for both your answers. Reverting to 78.3 fixed the issue. Is there a way to opt out from automatically installing beta updates on our PCs?

Thanks

You need not do anything because beta is not an update for the stable release. No stable release is getting updated to beta, so this must have happened due to user error.

Thank you for using Thunderbird.

If you have got more questions Please send us a message.

https://support.mozilla.org/en-US/kb/thunderbird-beta

Greetings Firefox Volunteer.