Brave is our browser of choice for the reasons set forth here: https://privacytests.org/I am visiting the forum today because I still use and support Thunderbird (though we are looking to migrate away after two decades because they killed theming & z...
No problem here with current versions of Thunderbird & Mac OS. Check your fonts, create a new test profile, or post in the correct support forum:https://support.mozilla.org/en-US/questions/thunderbird
You would get more replies if you post this in the correct support forum and include your OS name/version, Thunderbird version, installed extensions, crash logs, video, screen shots, et cetera.https://support.mozilla.org/en-US/questions/thunderbird