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Join UsVersion 91.0.3, first offered to channel users on August 26, 2021
Folder icons could be overridden by linked favicons in HTML messages
Unified folders showed no messages when underlying folders were removed
Folder pane toolbar did not always persist after restarting Thunderbird
Compose window attachment pane did not close when disabling signing of an OpenPGP message
Using "Reply to List" with some list emails incorrectly opened a "no-reply" warning
Unread message count badge on Windows tray icon did not update after moving messages to the Junk folder
Account setup UX issues with Exchange autodiscover
Account settings did not display non-UTF-8 server descriptions correctly
Thunderbird sometimes sent an unnecessary "SMTPUTF8", causing some servers to reject mail
No mouseover pop was displayed with event details for non-all-day events in the Today Pane
Filtering tasks in the Today Pane did not work
Email based event scheduling displayed the date and time in a format unreadable by humans