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Join UsVersion 101.0beta, first offered to channel users on May 4, 2022
Google Talk chat accounts now support logging in with OAuth2
Matrix reactions (emoji) now supported
New profiles will default to using "Threaded" message view
OpenPGP Key Manager will now display key creation date
Replaced Security compose toolbar button with Encryption toggle and Encryption options buttons
A warning is now displayed if an OpenPGP key has unsafe attributes that are ignored; See support article.
Per-recipient and per-domain email format preferences removed; Sending options moved to Compose Settings
Messages did not reload in all open windows after Junk status was changed
Messages with Message-Id headers longer than 332 characters could not be forwarded
OpenPGP integration in Thunderbird 91.8.0 and 91.8.1 rejected key properties bound with SHA-1 signatures
OpenPGP "Repair Message" button did not work with some emails
Encryption status in compose window did not refresh after OpenPGP key change events
OpenPGP Key Properties dialog incorrectly displayed a subkey ID sometimes
News messages were not displayed if previously accessed by URI without subscribing to the group
Changing news server hostname caused in infinite subscription prompts
Authenticating to some news servers failed
Detached attachments were opened from a temporary copy instead of the selected save location
Opening "cid:" links failed
Changing focus in the compose window with multiple recipient pills selected did not always deselect the pills
Standalone message windows were not draggable by the title bar on macOS
LDAP extensible filters of form type:rule:=value
did not work
Subscribing to CardDAV address books from Account Setup tab did not subscribe to all selected address books
Adding CardDAV address books failed if a mail extension-provided address book was present
OTR encrypted chat did not work on FreeBSD
URI-encoded Matrix mentions were not handled
Removing obsolete proprietary chat accounts did not work
Calendar event updates could not be accepted
Calendar event dialog was not properly sized, cutting off its contents
HTML for unmodified recurring events was not displayed in the event dialog
Various UX and theme improvements
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On Windows, tabs such as Add-ons Manager displayed with a light theme when dark theme was enabled
Menu items in OpenPGP compose toolbar button did not display a check mark when active
OpenPGP Key Assistant enabled by default
OpenPGP Key Properties now supports refreshing keys from key server
Compose toolbar button for OpenPGP & S/MIME signing available via "Customize Toolbar"
OpenPGP dialog for key "acceptance per email" now displayed in more circumstances
Importing OpenPGP public keys without a blank line following the header failed
OpenPGP CollectedKeysDB could have duplicates; Revocations were not stored in CollectedKeysDB
OpenPGP keys rejected for an email may be handled incorrectly
S/MIME encrypted emails incorrectly showed email Subject as encrypted
Printing using the system dialog without preview now supported; Set print.prefer_system_dialog
to true
IMAP flag changes from another client were not seen after some inactivity