And of course if you revert to v91.13.1 (or any older version), you need to disable automatic updates. And you will need to re-create your profile (not a big deal, I've done it several times).
v91.13.1 seems to be the last full release in which the pen worked, in case you want to install that: archive.mozilla.org/pub/thunderbird/releases/91.13.1/
Yes, and same with Microsoft Surface Book (Windows 10 and 11), and same problem with Thunderbird. FF and TB seem to be the only apps suffering from this limitation, eg, Chrome works fine. FF, TB and Chrome all interpret holding down the pen as ...
