Thunderbird Desktop
Version 128.0esr | Released July 11, 2024
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 128.0 is only offered as direct download from thunderbird.net and not as an upgrade from Thunderbird version 115 or earlier. A future release will provide updates from earlier versions.
For more on all the new features in Thunderbird 128, see What’s New in Thunderbird 128.
System Requirements: Details
What’s New
new
UI density now affects multi-message view
new
Added new preference mail.addressDisplayFormat
to always display full name and email address of all recipients in message list
new
"Archived-At" message header field is now displayed as a link, and Message Permalink option is now available in List-Id menu
new
Threaded message views now include "New Message" count
new
Cards View hover and selection paradigms introduced to better support custom themes and accent colors
new
Added account context menu to Unified Toolbar "Get Messages" button, creating quick access option to retrieve new messages for individual accounts
new
OpenPGP no longer attempts to re-initialize secret key storage if individual OpenPGP secret key passphrases have been enabled
new
OpenPGP Key Manager can now create revocation statements for any secret key
new
A nested OpenPGP message's signature status is now viewable
new
Changing expiration of OpenPGP keys with a "complex" structure is now supported
new
Enabled ECDH encryption and decryption for S/MIME messages
new
Custom account colors are now shown in the "From" field when composing a message
new
Manual account configuration now implements form validation
new
iCloud contacts and calendar discovery now supported when using a dedicated app password
new
Improved layout of LDAP address book properties dialog
new
Thunderbird now uses native Windows notifications
new
Added support for OS-specific accent colors
new
Added system accent color support for various elements
new
Selection indicator added to folder pane and address book pane
new
Thunderbird now decodes messages nested in attachments even if decodeSubMessages
preference is set to "false"
What’s Changed
changed
Improved Cards View readability and accessibility
changed
Better threading and unread/new indicators for Cards View threaded messages
changed
Removed Account Provisioner
changed
Search bars in Thunderbird now use a common custom element for more consistency
changed
Updated donation link from "give.thunderbird.net" to "www.thunderbird.net/donate/"
changed
Activity Manager now shows account and full folder path when indexing
changed
Spam and Junk message styling in Card UI adjusted to be less distracting
changed
Removed mail.openpgp.key_assistant.enable
preference
changed
Disabled support for LibrePGP v5 AEAD/OCB decryption
changed
"Permissive" importing of problematic OpenPGP keys now disabled by default; Set mail.openpgp.allow_permissive_import
to allow
changed
A warning is now displayed when importing OpenPGP keys that advertise unsupported features
changed
Default sort order of messages in message list changed to descending (newest at top)
changed
Added Show more/less buttons to notifications in Account Hub
changed
Removed "Becky! Internet Mail" importer
changed
The "prefer display name" preference for individual contacts was removed in favor of the global preference
changed
Address book updated to new card design
changed
Addressbook toolbar updated with the same UI/UX paradigms of the folder pane
changed
Folder alerts now display full path of affected folder
changed
IMAP "Too Many Connections" alerts now display IMAP server name
changed
Date range intervals in "Find Events" panel updated
changed
Calendar ICS file import now always uses new importer
What’s Fixed
fixed
Thunderbird "--migration" flag opened empty window
fixed
"Confirm Deletion" prompt was incorrectly shown when deleting messages with Grouped By header also selected
fixed
Thunderbird did not remove temporary directory created from adding attachment to message via drag-and-drop
fixed
Certificate errors silently failed when fetching new messages
fixed
Clicking on native Windows notifications did not bring Thunderbird to the foreground
fixed
3-pane view was blank after starting Thunderbird with unsent messages in outbox
fixed
Some menu bar items did not work with all Thunderbird windows closed on macOS
fixed
Sender in multi-message view was right aligned when the text wrapped to multiple lines
fixed
"Find in this message" did not work in multi-message view
fixed
Non-compliant "References" headers were not handled gracefully when mailnews.headers.showReferences
was set
fixed
"news://" URIs failed opening as links or from the commandline
fixed
Thunderbird sometimes displayed a blank screen on startup
fixed
Standalone window titles no longer included message subject on macOS
fixed
Links with IP address as link text and destination incorrectly warned user that link text and destination did not match
fixed
"Open message in conversation" and "Open message in containing folder" from a standalone window failed
fixed
"Get Messages" toolbar button was initially disabled after opening a message from a file in a new window
fixed
"Open Browser With Message-ID" failed for Google Groups due to URL change
fixed
Focus behavior for opening messages in a new tab changed depending on state of mail.tabs.loadInBackground
preference
fixed
Focus changes in 3-pane view occassionally caused keyboard shortcuts to stop working
fixed
Selected row in folder pane did not always remain visible when using keyboard navigation
fixed
Using middle-mouse click on a message (open in background tab) did not work
fixed
Group-by-sort Unified folders were slow to open when expanded-all
fixed
Holding Shift key while selecting "Delete" from message context menu did not permanently delete message
fixed
Holding Shift and middle-clicking a message with loadInBackground
preference set to "false" did not open new tab in background as expected
fixed
"Watch Thread" command was incorrectly available on multi-folder and search views
fixed
"Ignore Thread" did not work on multi-folder and search views
fixed
Date column of "Grouped By" message views now refreshes at midnight, preventing incorrect dates from being displayed
fixed
Deleting a mail folder failed silently when disk space was low
fixed
Undoing deletion of an email from standalone window was not possible
fixed
Sort type in Quick Filtered and Grouped By unified folders was not preserved after search was modified or cleared
fixed
Unified Folders did not preserve sort setting when switching to unthreaded view
fixed
Thunderbird did not always display message deletion confirmation when using Shift+Delete keyboard shortcut
fixed
Deleting collapsed group in Grouped By Sort did not update the message list to reflect the change
fixed
Secondary sort was discarded when sorting threaded unified folders
fixed
Accidental deletion of multiple messages occurred when Delete was pressed and held
fixed
Message count for synthetic folder views was sometimes incorrect
fixed
Count of messages in a thread was not refreshed when a message was deleted externally
fixed
Tag folders with non-alphanumeric characters did not work correctly
fixed
Scrolling to an unread message in an expanded thread did not show as much of the thread as possible
fixed
In a synthetic view, right-clicking an unselected message incorrectly selected the message
fixed
Messages could not be sorted by columns that were not visible
fixed
Display columns reverted to default columns after an IMAP folder was repaired
fixed
Mark as "Read By Date" was not available when a folder with unread messages was selected
fixed
Dynamic height calculation for Cards View based on density and font-size
fixed
Message List display options were hidden outside of Thunderbird window
fixed
Compact icon on Unified Toolbar was updated with a compact folder icon
fixed
Improved localization of OpenPGP strings
fixed
Creating a new key from the OpenPGP Key Manager erroneously displayed a "Go Back" button on the first page of the wizard
fixed
Some OpenPGP dialogs' buttons were inaccessible off screen
fixed
OpenPGP decoding of Base64 data did not allow for spaces and tabs before footer
fixed
When using an external installation of GnuPG, Thunderbird occassionally sent/received corrupted messages
fixed
Parsing an email address with a comment caused a failure for OpenPGP
fixed
S/MIME messages did not display MIME message if MIME header was missing
fixed
S/MIME status (encryption and signature) was not shown when opening an email from a file
fixed
Add tooltip displaying full folder path when hovering over location column of thread pane
fixed
Clear button was missing from Unified Toolbar customization search bar
fixed
Global search sometimes loaded slowly when opening "Show results as lists" and other synthetic views
fixed
References and Reply-To headers were not set if they were included in mail.compose.other.header
fixed
Message compose window was not fully disabled while message was sending
fixed
Delivery Status Notification did not work when sending message using "Send Later"
fixed
Print dialog opened in Message compose window did not prevent window interaction
fixed
Source of 'news:' links were incorrectly attached to messages by default
fixed
Password Manager did not remember the last selected item when changing sorting or showing/hiding passwords in unfiltered view
fixed
Entries removed from Password Manager left behind blank entries
fixed
Messages moved to junk folder from message context menu were marked as read, regardless of whether "Mark messages determined to be junk as read" was checked/unchecked in settings
fixed
New posts retrieved from RSS feeds incorrectly played mail alert sound
fixed
No "Close" button in Cookie Manager on macOS
fixed
Pressing Esc did not close the Cookie Manager dialog
fixed
Modifying Thunderbird UI font size outside of Thunderbird caused App Menu > Font Size option to be disabled
fixed
Chat Account Settings did not allow scrolling to view overflowed window contents
fixed
Account setup triggered a second OAuth when looking for calendars
fixed
Google Calendar account detection failed for Google-hosted domains when the DNS entry had uppercase characters
fixed
Thunderbird did not have a preference to enable archiving inbox as a folder
fixed
Yahoo! and AOL account message filters only filtered most recent message match
fixed
Querying DNS TXT records that return multiple records failed
fixed
Yahoo! and AOL account message filters only filtered most recent message match
fixed
"Copy/Cut" context menus did not work in extension options pages
fixed
Adding duplicate mail addresses in "New/Edit mailing list" dialog, pressing OK, then removing one of the duplicate addresses caused both addresses to be removed
fixed
Address Book scrolling did not work when using keyboard navigation
fixed
CardDAV addressbooks could not be used as an import target
fixed
Removing Organizational Properties from a contact did not clear all organization-related fields
fixed
CardDAV contacts were synced to server when no changes were made
fixed
Compose window toolbar items were unreadable on macOS in dark mode
fixed
Dark mode colors were inconsistent throughout Thunderbird
fixed
NVDA keyboard table navigation of message list did not work in table view
fixed
IMAP folders containing other folders could not be deleted due to Thunderbird using "unsubscribe" IMAP command
fixed
Draft messages were not replaced when saved to an IMAP server without UIDPLUS support
fixed
Connection sometimes timed out when a large number of POP3 messages were left on server
fixed
SMTP messages using GSSAPI authentication failed to send
fixed
Status of IMAP message download progress was incorrect in some locales
fixed
Newsgroup messages were sometimes incorrectly interleaved when using offline cache
fixed
Thunderbird sometimes froze when checking for new messages on multiple POP3 accounts simultaneously
fixed
POP3 tried using USERPASS first (plaintext credentials), before attempting AUTH PLAIN and AUTH LOGIN (obfuscated credentials)
fixed
POP3 server connection sometimes timed out when processing LIST and UIDL responses
fixed
Restart was necessary to read an NNTP message if a network error occured during message retrieval
fixed
Account manager and about:support could break if the chat buddy list became corrupted
fixed
IRC SASL authentication was enabled by default for all IRC servers
fixed
IMAP accounts with missing or incorrect OAuth credentials sometimes caused duplicate dialogs to appear, requesting a new OAuth token
fixed
Hardware key multi-factor authentication did not work in Thunderbird Flatpak
fixed
Thunderbird defaulted to insecure connection when Exchange Autodiscover configuration was misconfigured
fixed
Thunderbird incorrectly rejected some valid RSS feeds
fixed
macOS performance improvements
fixed
Updating times of recurring events also modified the event exception times
fixed
Calendar 'Find Events Pane' did not match search terms if they included uppercase letters
fixed
Calendar day headings did not switch between short and long form when resizing calendar view
fixed
Task categories menu did not display category colors
fixed
Today Pane was not Keyboard accessible
fixed
"Item changed on server" calendar dialog did not have a scrollbar for long content, causing action buttons to be off screen
fixed
Accepting/declining appointments did not always send confirmation
fixed
Convert To > Event did not save events on some CalDAV servers
fixed
Context menu cleanup
fixed
Various Cards View UX improvements
fixed
Various visual and UX improvements
fixed
Known Issues
unresolved
"latest" download bouncer aliases are not available for 128.0esr at this time