There is a new global font size setting in this release: https://twitter.com/mozthunderbird/status/1539307322043797504 https://twitter.com/mozthunderbird/statu

There is a new global font size setting in this release: https://twitter.com/mozthunderbird/status/1539307322043797504 https://twitter.com/mozthunderbird/status/153930732204379750... If you want to target the message list specifically, I'm pretty certain that can be done with a userChrome.css tweak.