Rated 3 out of 5 stars

As much as I like the add-on, it feels there is no more development happening. A Thunderbird email client version TB 115 is still not detected/shown as such. Are there any plans to keep this add-on updated? Lastt update was in July 2022.
Thanks

This review is for a previous version of the add-on (2.9.13).  This user has a previous review of this add-on.

I felt the same way last year. We're now carrying it forward at https://github.com/marcelstoer/display-mail-user-agent-t. A new release will be published here soon.