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Join UsVersion 91.2.1, first offered to channel users on October 21, 2021
Preference added to disable automatic pausing RSS feed updates after a fetch failure
Recipeint address pills in an error state could incorrectly merge with mailing list pills when expanding the list
BCC-only messages could not be sent from the Outbox
Default DSN request was not set when using "Edit as New Message"
Vertical scrollbar in "Conversations" chat panel did not work correctly
Chat account "Advanced Options" dialog had no clickable buttons on macOS
RSS feed attachments could not be saved
Public ICS calendars served with an incorrect Content-Type could not be added
Setting a CalDAV calendar to manually update had no effect
CalDAV calendars set to read-only became writable after restarting Thunderbird
Saving a copy of a calendar invite (More -> Save As Copy) did not work
Events in the first or last week of a month were not always printed when printing a month view
Accessibility improvements; clearer display of area of focus
Various theme improvements, HiDPI improvements
"Attachments" menu panels for attached files were empty
Stability improvements