With Linux distributions many build their own Thunderbird from source. SO where did you get yours?

Have you approached the distribution support?

My computer uses Pop OS. It is its native distribution. I did approach the distribution support, as a matter of fact they suggested that I try to ask my question here. Apparently, the person I talked to told me that he saw thunderbird cause freezing in other cases.

I am aware of many possible causes of Thunderbird not responding, I am aware of nothing that would hang an entire Linux operating system. Thunderbird should not be able to do that in Linux.

Have you seen these topics https://github.com/pop-os/pop/issues/1172 https://support.system76.com/articles/freezing-behavior/

I have also seen issues over the years, most especially on Linux, where open source video drivers cause issues with Firefox and Thunderbird. Try changing the hardware acceleration in preferences. As the issues are driver specific there is no correct setting for hardware acceleration.

Thank you for your help.

I have tried a couple of things over the last few days without any success, but here is why I strongly suspect a link with thunderbird: - Yesterday I had to reboot at least 5 times in a row. The sixth I did not open thunderbird and could work safely the entire day. The same thing happened today. - I tried to uninstall and reinstall thunderbird on my computer this morning, but after roughly one minute, the computer always got frozen, so that I did not even have the time to setup my account properly (I do not use add-ons). - The freezing appeared anytime I used thunderbird, even when it is the only software I run, so I do not think it can be related with a conflict involving another software.

I will check what I can do for the hardware acceleration, and keep in touch if anything new happens.