My Thunderbird was configured to update automatically, but when they upgraded the program to version 105 I put a halt to that and rolled it back to version 102. 105 broke too many things that I liked, especially the color schemes. So my suggestion would be uninstall your current version, reinstall the last version 102, then afterwards turn off the auto-update in both the config editor and the program itself. It’s the only thing that saved me the grief and frustration of dealing with programmers who forget how to keep a program user friendly.
where did you get version 102? Looks like I’m on 102, because I’ve been using the standard repos for Mint.