That link should've been:

https://support.mozilla.org/en-US/questions/1548668#answer-1779923

well, once again, my 140.5.0esr installation morphed in to 144.01 after spending hours rebuilding my folders - only to loose half of them again.

All this pain for MS Exchange worth it?

Hello

Similars questions. https://support.mozilla.org/en-US/questions/1545967 https://support.mozilla.org/en-US/questions/1546004

https://connect.mozilla.org/t5/ideas/option-to-disable-update-reminders/idc-p/46382

For information purposes. You can try, policies.json, DisableAppUpdate.

{ "policies": { "DisableAppUpdate": true } }

A illustration.

Note : somes external applications can be a source of updates (e.g.) antivirus computer protection security software. Example. https://forums.mozfr.org/viewtopic.php?t=151864 https://connect.mozilla.org/t5/discussions/where-have-the-top-right-icons-gone/m-p/110616/highlight/true#M42771

Somes external applications, can be a source of updates, is it your case.

Note : somes external applications can be a source of updates (e.g.) antivirus computer protection security software.

Good point as I have seen over the years of threads where people use some application that helps keep their various applications updated cause issues. For example the app may think the current Firefox ESR channel version was not current and would try to update it to current Firefox version on Release channel.

I do NOT use any app or program that "checks to see if any of my programs are in need of 'updating', let alone would allow them to update any that need it." If a program needs updating, I always use that program's updating feature to do the updating.

Also, why is it that ONLY TB is behaving like this?