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Join UsVersion 89.0beta, first offered to channel users on April 21, 2021
Access to Outlook Contacts; To enable, set ldap_2.servers.outlook.dirType
to 3
; This setting may cause startup delays.
Renamed "Add-ons" to "Add-ons and Themes" and "Options" to "Preferences"
Chat modules and custom widgets are now lazy-loaded to improve Thunderbird startup time
Links in PDF attachments did not open in a web browser
Printing to a PDF file failed
New message notifications displayed messages that were older than the newly received message
Sending messages with attachments sometimes failed
When removing a mail folder, Thunderbird did not correctly warn about all affected filters
Various improvements to recipient pills in message compose window
Message preview "tooltips" did not appear when hovering over a message in the message list
On Windows, it was possible for the taskbar icon and the tray icon to both disappear under some circumstances
Removing an address book while viewing "All address books" did not remove its contents from the view
Bundled OTR library did not work on macOS
Chat: OAuth window was too small to be usable
Event boxes were not always focused when clicked
Dragging and dropping an ICS file to the Today Pane did not populate the "New Event" dialog
Calendar notifications were not displayed in order
Event dialog layout refreshed
Dark Theme fixes and improvements
System theme on Linux did not always use native scrollbars
Selected OpenPGP key was lost after opening the Key Properties dialog in Account Settings
"Outgoing (SMTP) Server" password dialog did not have an option to remember the password
Thunderbird sent invalid IPv6 literals in SMTP HELO, resulting in unsent messages
Account Setup did not always complete successfully when opened from Account Settings page
User nickname colors were not used in chat content
Chat: Multiple system messages did not collapse
Various fixes related to introduction of Proton UI upstream
Added support for importing OpenPGP keys without a primary secret key
Unable to create folder names containing ampersand (&) characters on some IMAP servers
Quoted plain text messages wrapped incorrectly when using format=flowed and quoted-printable
Sending messages with BCC'd recipients failed if the message contained non-UTF-8 attachments
SMTP with NTLM authentication did not work
Parsing some OpenPGP user IDs failed
Various improvements to OpenPGP partial encryption reminders
New mail notification sound was not played if new mail arrived without reading previously recevied messages
Troubleshooting information page did not display row labels on macOS
Various fixes related to introduction of Proton UI upstream
Unable to send messages when the SMTP server password contained non-ASCII characters
Draft messages with attachments could not be saved if the message was closed and opened for editing a second time
Sending replies sometimes failed if message had BCC'd recipients
Some temporary files created by the message composer were not automatically removed after closing the compose window
Contacts moved between CardDAV address books were not synced to the new server
Google Contacts via CardDAV stopped synchronizing after an hour
Participant names in an XMPP multi-user conference were displayed incorrectly if the display name contained UTF-8 characters
Calendar: Reduced flickering effect in Today Pane
Calendar: The time of day indicator line did not update automatically
Mail toolbar buttons were too big when displaying both icons and text
Various fixes related to introduction of Proton UI upstream
OpenPGP security fixes