Thunderbird Desktop
Version 121.0beta | Released November 22, 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.
These notes apply to Thunderbird version 121 beta 6 released December 11, 2023.
System Requirements: Details
- Windows: Windows 10 or later
- Mac: macOS 10.15 or later
- Linux: GTK+ 3.14 or higher
What’s Fixed
fixed
Messages opened in background tab were incorrectly marked as read
fixed
Thunderbird now attempts to reconnect on a new connection after SMTP 4xx errors
fixed
IMAP messages deleted in Thunderbird still appeared in other email clients that don't respect messages marked "\deleted"
fixed
Mark All Read did not work for virtual folders
fixed
Unified folders were missing "Mark Folder Read" option in context menu
fixed
Add tooltip displaying full folder path when hovering over location column of thread pane
fixed
"Reply to List" was incorrectly disabled in Unified Toolbar since Thunderbird 115.4.1
fixed
Sorting by column with "Grouped By" enabled then performing a quick filter search caused blank message pane
fixed
Star and junk icons showed incorrect state for selected-focused messages in table view
fixed
View menu in message window did not initialize correctly
fixed
Links with IP address as link text and destination incorrectly warned user that link text and destination did not match
fixed
Attachment list did not always appear if remote message content loaded slowly
fixed
OpenPGP signatures rejected due to mismatched signature timestamp now display signature timestamp and clarifying message
fixed
Advanced address book search did not return results if display name was left blank
fixed
Clicking on attendee when inviting attendees added the attendee twice
fixed
Various Cards View UX improvements
fixed
Various UX and visual improvements
Fixed in beta 2
What’s Fixed
fixed
3-pane view was blank after starting Thunderbird with unsent messages in outbox
fixed
Messages in outbox were not shown as unread by default
fixed
"Apply columns to" sometimes failed to apply columns to a root folder and its descendants
fixed
Global search results displayed as a list did not allow threads to be collapsed
fixed
"Quick Filter" button on toolbar was disabled when viewing search results as a list
fixed
Images could not be copied and pasted from one message into another
fixed
Undoing deletion of local messages required using "Undo" (Ctrl-Z) twice
fixed
Some labels were missing from Add-ons Manager
fixed
Troubleshooting page (about:support) did not work on profiles with no outgoing email server, such as news-only profiles
Fixed in beta 3
What’s Fixed
fixed
Windows taskbar icon did not have the "Beta" label
fixed
HTML FileLink attachments used the wrong encoding
fixed
IMAP folder discovery was slowed by status bar message updates
Fixed in beta 4
What’s Fixed
fixed
Servers with non-LDH (letters-digits-hyphens) hostnames, such as those containing non-ASCII Unicode characters, could not be found
fixed
High CPU usage sometimes occurred with IMAP CONDSTORE (conditional STORE) enabled
fixed
Replying to a collapsed thread via keyboard shortcut (Ctrl+R/Cmd+R) opened a reply for every message in the thread
fixed
Folder open hover delay was too short when using drag-and-drop
fixed
Parent folders with collapsed subfolders did not consistently display new mail indicator or message count for subfolders
fixed
Minimize/maximize button order was incorrect when placing window titlebar buttons on left-hand side
Fixed in beta 5
What’s Fixed
fixed
OpenPGP integraton with smartcard using latest version of Gpg4Win failed
fixed
Message list scroll position could move randomly when switching folders
fixed
macOS Contacts integration with Thunderbird address book did not work
Fixed in beta 6
What’s Fixed
fixed
Message selection misbehaved after selecting a sub-message in an expanded thread, collapsing the thread, then pressing up/down to move selection
