Thunderbird Desktop
Version 115.0 | Released July 11, 2023
Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.
Thunderbird version 115.0 is only offered as direct download from thunderbird.net and not as an upgrade from Thunderbird version 102 or earlier. A future release will provide updates from earlier versions.
For more on all the new features in Thunderbird 115, see What’s New in Thunderbird 115.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.12 or later
- Linux: GTK+ 3.14 or higher
What’s New
new
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
New folders are now added to virtual parent folders and saved searches automatically
new
Thunderbird can now open external .eml files in a tab
new
"Move To" and "Copy To" actions added to Folder context menu
new
Thunderbird now supports HKP keyservers that return one key per email address
new
Thunderbird can now upload OpenPGP public keys to VKS and HKP keyservers
new
Thunderbird now notifies the user if a message includes nested encryption, and allows viewing each encrypted part of the message
new
OpenPGP signature dates are now shown for signed messages
new
OpenPGP candidate keys can now be discovered and imported from GnuPG keyring, if external GnuPG is enabled
new
Candidate OpenPGP keys are now automatically discovered from GnuPG keyring, if external GnuPG is enabled
new
Thunderbird now supports option to always send public key with autocrypt header
new
Automatic enabling/disabling of encryption can now be enabled through UI
new
User-defined OpenPGP passphrases now supported
new
OpenPGP signature filenames now always end in ".asc"
new
Thunderbird can now open OpenPGP Key Manager dialog from commandline using "-keymanager" option
new
Using CSS styles in composer enabled; set editor.use_css
to true
new
Thunderbird now supports OAuth2 for Fastmail
new
Thunderbird now includes the option to send a minimal user agent header, or no header at all
new
Thunderbird will now send a minimal user-agent header by default
new
Searching for "about:config" in Settings now finds "about:config"
new
Added option to always show system tray icon on Windows
new
Address book cards now support phone and fax number links
new
Thunderbird now includes a "app.update.log.file" preference to enable logging of updates
new
Search Engines Enterprise Policy added
new
Thunderbird can now individually reload remote calendars
new
Added "Show tasks in calendar" option to Calendar Control menu
new
Setting to use OS-configure timezone added
What’s Changed
changed
Office365 accounts using password authentication will auto-migrate to OAuth2
changed
Thunderbird now uses a non-private browser for OAuth login, allowing login to Microsoft Office 365 with Conditional Access Policies enabled
changed
Thunderbird now opens all external links from 3-pane window in the user's browser
changed
HTML emails are now rendered in Standards mode
changed
Link to "introduction to e2e encryption" article updated
changed
OpenPGP messages now default to using combined signing and encryption
changed
Thunderbird now displays a warning when trying to send a message if the current OpenPGP key is expired
changed
S/MIME signatures using the MD5 or SHA1 hash algorithms are now rejected
changed
Extension "Options" button now disabled rather than hidden when an extension is disabled or has no options
changed
Support for additional fields added to Address Book
changed
Search box in horizontal Address book layout moved to the left
changed
Updated Thunderbird color palette
changed
C++ NNTP implementation removed
changed
POP C++ implementation removed
changed
Thunderbird will reuse SMTP connections when sending multiple messages
changed
Names for empty Matrix rooms can now be localized
changed
Next and Previous Calendar menu items in Go menu now hidden until Calendar is activated
What’s Fixed
fixed
Users using Microsoft business email services may not be able to login due to deprecation of basic auth for Exchange
fixed
Spell Check dialog did not open when selected text included a line break or new paragraph
fixed
Autocomplete functionality in the composer failed under some circumstances
fixed
Some emojis displayed incorrectly when added to a message; added angry face emoji
fixed
Unicode character set information was not included in message header when composing message via "Forward" or "Edit as new message"
fixed
Forwarding messages as attachment via drag-and-drop did not follow preference to add file extension to attachment file names
fixed
Subject lines longer than the available title bar width in "New Message" window displaced title bar buttons on macOS
fixed
Opening internal document links in PDF files opened a new tab with a copy of the document instead of scrolling to the linked location
fixed
"Gentle smile" plain text ;) emoticons were incorrectly rendered as "Strong smile"/"Laugh"
fixed
Files saved via Save Attachment did not appear under Saved Files
fixed
Buttons in message header (Reply, Forward, etc) were not keyboard accessible
fixed
Drop-down buttons in message header could not be activated using Enter or Space
fixed
A "Learn More" link was missing from the "Do not track" option in "Privacy & Security" Settings
fixed
"Empty Trash on Exit" was not always triggered when message quarantine was enabled
fixed
Emails in Yahoo and AOL accounts were incorrectly classified as Junk
fixed
"Run Junk Mail Controls" did not work
fixed
HTML signature containing image hosted on a web server changed source URL of image to local filename
fixed
Changing the default search engine did not persist after closing "Settings" tab
fixed
About dialog display of distribution.ini information restored
fixed
All menu items in "Help" menu were disabled after sending a message on macOS
fixed
An empty dialog message was displayed when sending an OpenPGP signed email with a key that could not be found
fixed
When reopening OpenPGP-encrypted drafts/templates after closing the compose window, Thunderbird did not restore the subject line
fixed
OpenPGP key verification only used first From field for emails with multiple From fields
fixed
Encrypted attachment was displayed on OpenPGP encrypted messages, even if no attachment was available
fixed
When disk is full, partial data left behind by IMAP/News folder compaction was not deleted
fixed
Thunderbird did not decrypt OpenPGP messages with an additional outer signature layer
fixed
(was: old subject) was not removed from message subject on reply with OpenPGP enabled
fixed
Context menu could not be opened in OpenPGP key manager using keyboard
fixed
"Passphrase" tab of Key Manager was incorrectly shown for public keys
fixed
Upstream RNP version numbers now recognized as official in about:support
fixed
Expired OpenPGP keys were shown as "Not found" in Account Settings
fixed
Layout and styling issues with OpenPGP dialogs
fixed
Encrypted messages could not be decrypted using revoked OpenPGP key
fixed
Thunderbird no longer requires a primary secret key to be available when signing messages
fixed
Thunderbird was unable to send signed messages with OpenPGP subkey
fixed
OpenPGP Message Security dialog was sometimes positioned incorrectly
fixed
Messages signed with revoked S/MIME certificates were displayed as correctly signed
fixed
Auto-enabling and auto-disabling of E2E encryption did not behave as expected under certain circumstances
fixed
Automatic detection of SSL/TLS connections during account creation was broken
fixed
Canceling account setup during verification prevents account from being added again
fixed
Manually-configured accounts were silently deleted after pressing "Finish" on Account Setup page
fixed
Loss of messages would occur if messages were moved from POP/Local to IMAP while offline, followed by going online
fixed
POP3 messages were deleted from server when attachments were detached from the message in Thunderbird
fixed
Thunderbird sometimes did not synchronize offline IMAP folders after a restart
fixed
IMAP autosync sometimes stopped after restoring computer from sleep or hibernation
fixed
Loss of connection while moving multiple messages to an IMAP server could result in duplicate messages on source and destination servers
fixed
Thunderbird did not check to see if "UTF8=ACCEPT" is supported by IMAP server before enabling it
fixed
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
fixed
IMAP folder "Compact" action did not wait for expunge operation to complete prior to compaction
fixed
Progress dialog did not appear for manual retry of saving IMAP messages to Sent, Draft, or Template folders
fixed
Embedded images now include filename and extension in header if none is included
fixed
Messages could not be sent through some SMTP servers due to unhandled formatting of username prompt
fixed
NNTP message streaming did not work, resulting in uncaught errors
fixed
NNTP connection was not closed immediately if authentication dialog was canceled
fixed
Search on Server only returned results for articles on the server that had already been downloaded
fixed
Status bar did not update when NNTP server connected/disconnected
fixed
Adding too many terms to an Advanced Address Book Search caused the list view to overflow without scrolling, making overflowed terms inaccessible
fixed
Contact pane was not resizable when editing a contact
fixed
Creating a new contact was possible while editing an existing contact, with data loss of unsaved changes possible
fixed
Deleting or moving a contact from one address book to another did not update the list of cards
fixed
CardDAV discovery now uses preset location if MX records point to Google
fixed
Long lists of chat conversations could not be fully viewed or scrolled
fixed
Thunderbird incorrectly addressed all XMPP pings to the connected XMPP server, rather than the originator of the ping
fixed
Duplicate Matrix clients were created under certain circumstances, resulting in duplicate messages under the same account
fixed
Encryption of new Matrix direct messages was not detected correctly
fixed
Matrix direct message rooms were duplicated under certain circumstances
fixed
Events were not shown in the correct week if week start was not set to Monday
fixed
When creating a new event, the organizer was not automatically added to the event
fixed
Calendar time-of-day indicator increasingly drifted ahead of current time when staying on calendar tab without switching to other tabs
fixed
Multi-part messages could not be converted to tasks
fixed
Editing events via right click menu failed to save changes
fixed
Task previews did not show HTML formatting
fixed
Attendees in Event Summary dialog were not selectable
fixed
After restarting Thunderbird, all-day to-do tasks changed to tasks set at midnight of the same day
fixed
Calendars with a name containing a slash could not be exported without first being renamed
fixed
Extra linebreaks in Google Calendar event descriptions removed
fixed
Modifying events in locally-hosted ICS calendars sometimes led to data loss
fixed
Local calendars with custom timezone definitions unable to sync with CalDAV servers