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Join UsVersion 115.0, first offered to channel users on July 11, 2023
Supernova UI with updated 3-Pane window with updated folder, message list, and message display panes; updated Quick Filter, Calendar and Address Book with new Vertical View, Unified Toolbar.
New folders are now added to virtual parent folders and saved searches automatically
Thunderbird can now open external .eml files in a tab
"Move To" and "Copy To" actions added to Folder context menu
Thunderbird now supports HKP keyservers that return one key per email address
Thunderbird can now upload OpenPGP public keys to VKS and HKP keyservers
Thunderbird now notifies the user if a message includes nested encryption, and allows viewing each encrypted part of the message
OpenPGP signature dates are now shown for signed messages
OpenPGP candidate keys can now be discovered and imported from GnuPG keyring, if external GnuPG is enabled
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
Automatic enabling/disabling of encryption can now be enabled through UI
User-defined OpenPGP passphrases now supported
OpenPGP signature filenames now always end in ".asc"
Thunderbird can now open OpenPGP Key Manager dialog from commandline using "-keymanager" option
Using CSS styles in composer enabled; set editor.use_css
to true
Thunderbird now supports OAuth2 for Fastmail
Thunderbird now includes the option to send a minimal user agent header, or no header at all
Thunderbird will now send a minimal user-agent header by default
Searching for "about:config" in Settings now finds "about:config"
Added option to always show system tray icon on Windows
Address book cards now support phone and fax number links
Thunderbird now includes a "app.update.log.file" preference to enable logging of updates
Search Engines Enterprise Policy added
Thunderbird can now individually reload remote calendars
Added "Show tasks in calendar" option to Calendar Control menu
Setting to use OS-configure timezone added
Office365 accounts using password authentication will auto-migrate to OAuth2
Thunderbird now uses a non-private browser for OAuth login, allowing login to Microsoft Office 365 with Conditional Access Policies enabled
Thunderbird now opens all external links from 3-pane window in the user's browser
HTML emails are now rendered in Standards mode
Link to "introduction to e2e encryption" article updated
OpenPGP messages now default to using combined signing and encryption
Thunderbird now displays a warning when trying to send a message if the current OpenPGP key is expired
S/MIME signatures using the MD5 or SHA1 hash algorithms are now rejected
Extension "Options" button now disabled rather than hidden when an extension is disabled or has no options
Support for additional fields added to Address Book
Search box in horizontal Address book layout moved to the left
Updated Thunderbird color palette
C++ NNTP implementation removed
POP C++ implementation removed
Thunderbird will reuse SMTP connections when sending multiple messages
Names for empty Matrix rooms can now be localized
Next and Previous Calendar menu items in Go menu now hidden until Calendar is activated
Users using Microsoft business email services may not be able to login due to deprecation of basic auth for Exchange
Spell Check dialog did not open when selected text included a line break or new paragraph
Autocomplete functionality in the composer failed under some circumstances
Some emojis displayed incorrectly when added to a message; added angry face emoji
Unicode character set information was not included in message header when composing message via "Forward" or "Edit as new message"
Forwarding messages as attachment via drag-and-drop did not follow preference to add file extension to attachment file names
Subject lines longer than the available title bar width in "New Message" window displaced title bar buttons on macOS
Opening internal document links in PDF files opened a new tab with a copy of the document instead of scrolling to the linked location
"Gentle smile" plain text ;) emoticons were incorrectly rendered as "Strong smile"/"Laugh"
Files saved via Save Attachment did not appear under Saved Files
Buttons in message header (Reply, Forward, etc) were not keyboard accessible
Drop-down buttons in message header could not be activated using Enter or Space
A "Learn More" link was missing from the "Do not track" option in "Privacy & Security" Settings
"Empty Trash on Exit" was not always triggered when message quarantine was enabled
Emails in Yahoo and AOL accounts were incorrectly classified as Junk
"Run Junk Mail Controls" did not work
HTML signature containing image hosted on a web server changed source URL of image to local filename
Changing the default search engine did not persist after closing "Settings" tab
About dialog display of distribution.ini information restored
All menu items in "Help" menu were disabled after sending a message on macOS
An empty dialog message was displayed when sending an OpenPGP signed email with a key that could not be found
When reopening OpenPGP-encrypted drafts/templates after closing the compose window, Thunderbird did not restore the subject line
OpenPGP key verification only used first From field for emails with multiple From fields
Encrypted attachment was displayed on OpenPGP encrypted messages, even if no attachment was available
When disk is full, partial data left behind by IMAP/News folder compaction was not deleted
Thunderbird did not decrypt OpenPGP messages with an additional outer signature layer
(was: old subject) was not removed from message subject on reply with OpenPGP enabled
Context menu could not be opened in OpenPGP key manager using keyboard
"Passphrase" tab of Key Manager was incorrectly shown for public keys
Upstream RNP version numbers now recognized as official in about:support
Expired OpenPGP keys were shown as "Not found" in Account Settings
Layout and styling issues with OpenPGP dialogs
Encrypted messages could not be decrypted using revoked OpenPGP key
Thunderbird no longer requires a primary secret key to be available when signing messages
Thunderbird was unable to send signed messages with OpenPGP subkey
OpenPGP Message Security dialog was sometimes positioned incorrectly
Messages signed with revoked S/MIME certificates were displayed as correctly signed
Auto-enabling and auto-disabling of E2E encryption did not behave as expected under certain circumstances
Automatic detection of SSL/TLS connections during account creation was broken
Canceling account setup during verification prevents account from being added again
Manually-configured accounts were silently deleted after pressing "Finish" on Account Setup page
Loss of messages would occur if messages were moved from POP/Local to IMAP while offline, followed by going online
POP3 messages were deleted from server when attachments were detached from the message in Thunderbird
Thunderbird sometimes did not synchronize offline IMAP folders after a restart
IMAP autosync sometimes stopped after restoring computer from sleep or hibernation
Loss of connection while moving multiple messages to an IMAP server could result in duplicate messages on source and destination servers
Thunderbird did not check to see if "UTF8=ACCEPT" is supported by IMAP server before enabling it
Copying IMAP folders between servers failed when source folder was previously copied and deleted from destination server, and destination server is set to only mark items as deleted
IMAP folder "Compact" action did not wait for expunge operation to complete prior to compaction
Progress dialog did not appear for manual retry of saving IMAP messages to Sent, Draft, or Template folders
Embedded images now include filename and extension in header if none is included
Messages could not be sent through some SMTP servers due to unhandled formatting of username prompt
NNTP message streaming did not work, resulting in uncaught errors
NNTP connection was not closed immediately if authentication dialog was canceled
Search on Server only returned results for articles on the server that had already been downloaded
Status bar did not update when NNTP server connected/disconnected
Adding too many terms to an Advanced Address Book Search caused the list view to overflow without scrolling, making overflowed terms inaccessible
Contact pane was not resizable when editing a contact
Creating a new contact was possible while editing an existing contact, with data loss of unsaved changes possible
Deleting or moving a contact from one address book to another did not update the list of cards
CardDAV discovery now uses preset location if MX records point to Google
Long lists of chat conversations could not be fully viewed or scrolled
Thunderbird incorrectly addressed all XMPP pings to the connected XMPP server, rather than the originator of the ping
Duplicate Matrix clients were created under certain circumstances, resulting in duplicate messages under the same account
Encryption of new Matrix direct messages was not detected correctly
Matrix direct message rooms were duplicated under certain circumstances
Events were not shown in the correct week if week start was not set to Monday
When creating a new event, the organizer was not automatically added to the event
Calendar time-of-day indicator increasingly drifted ahead of current time when staying on calendar tab without switching to other tabs
Multi-part messages could not be converted to tasks
Editing events via right click menu failed to save changes
Task previews did not show HTML formatting
Attendees in Event Summary dialog were not selectable
After restarting Thunderbird, all-day to-do tasks changed to tasks set at midnight of the same day
Calendars with a name containing a slash could not be exported without first being renamed
Extra linebreaks in Google Calendar event descriptions removed
Modifying events in locally-hosted ICS calendars sometimes led to data loss
Local calendars with custom timezone definitions unable to sync with CalDAV servers