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Join UsVersion 112.0beta, first offered to channel users on March 15, 2023
Thunderbird will now send a minimal user-agent header by default
Thunderbird can now open external .eml files in a tab
Thunderbird now includes a "app.update.log.file" preference to enable logging of updates
Thunderbird now uses a non-private browser for OAuth login, allowing login to Microsoft Office 365 with Conditional Access Policies enabled
Thunderbird can now open OpenPGP Key Manager dialog from commandline using "-keymanager" option
Candidate OpenPGP keys are now automatically discovered from GnuPG keyring, if external GnuPG is enabled
Thunderbird now supports option to always send public key with autocrypt header
S/MIME signatures using the MD5 hash algorithm are now rejected
Messages with missing or corrupt "From:" header did not display message header buttons
Automatic POP3 message retrieval did not release folder lock after network error until "Get Messages" was manually clicked
Automatic detection of SSL/TLS connections during account creation was broken
Automatic detection of character set when quoting a message did not work
S/MIME signatures were not displayed correctly in nested messages
Thunderbird will now check to see if "UTF8=ACCEPT" is supported by IMAP server before enabling it
Address Book integration did not work with macOS 11.4 Bug Sur
Message List no longer fired focus events for screen reader users while navigating
Collapsing the root node of the Folder Pane using the left arrow key caused keyboard navigation of the Folder Pane to stop working
Various Unified Toolbar improvements
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Various 3-pane improvements
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Various Folder Pane improvements
Various Message List improvements
Various Message Reader improvements
Various Message Compose window improvements
Various Calendar improvements
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Various visual and UX improvements
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Clicking "Copy text to clipboard" on "Troubleshooting Information" page did not copy anything to the clipboard
Various visual and UX improvements
Additional Folder modes added to Folder Pane options meatball menu
New messages will automatically select S/MIME if configured and OpenPGP is not
"Read Messages" button in Account Central did not work
Converting an email to an event with "Convert To > Event" did not work
Message context menus in synthetic view results were incomplete
Message lists in Vertical view were missing message status and attachment indicators
Many visual and UX fixes and improvements
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Added "New" indicator to vertical view of Message Reader
"Unread" and "Favorite" folder tree mode improvements
Creating a saved search added the virtual folder twice
Unselectable GMail folders were not always hidden from the folder tree
Mail accounts in Folder Pane were not displayed in same order as in Account Settings
Keyboard accessibility improvements
Visual and theme improvements
Message "Back" and "Forward" buttons were not available in Unified Toolbar; Access keys in Go menu did not work
"Undo" and "Redo" commands did not work in message list
Message list select delay preference was not honored when doing fast keyboard navigation
Message list screen reader and keyboard accessibility fixes
Vertical message list was unaffected by UI density changes
"Zoom" feature did not work on message content
Folder Pane keyboard navigation improvements for accessing context menu
Message Filters dialog was not correctly sized for content and did not scroll
Printing a selected message failed
Contact pane was not resizable when editing a contact
Selecting text in address book did not work
Theme improvements
Visual density is now consistent between folder pane and message list
Deleting a message in Unified View did not select the next message in the message list
Messages selected in "Unread Folders" view disappeared immediately after being selected due to being marked as read
"Mark a message as deleted" did not properly mark IMAP messages as deleted
"Location" column in message list was blank for saved search folders
Message List spacing in compact mode had increased in beta 6, now restored
Drag and Drop .eml file onto message list did not work
Drag and Drop message to re-order list columns did not work
Additional message list improvements
Buttons in message header (Reply, Forward, etc) were not keyboard accessible
Screen reader accessibility is broken for message list and message bodies
Message selection behaves inconsistently
WebExtension APIs are currently broken
Various other Thunderbird "Supernova" features