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Join UsVersion 113.0beta, first offered to channel users on April 11, 2023
Added activity indicator to new Unified Toolbar
Added "Show tasks in calendar" option to Calendar Control menu
S/MIME messages that use SHA1-based signatures will now be rejected
Thunderbird on Wayland froze during every other startup if a primary password was set
Several buttons in Account Central did not work
Global search bar remained visible and partially functional when search was disabled
Ignoring and watching threads and subthreads did not behave as expected
New Unified folders were not marked as virtual folders
Keyboard scrolling did not work for message body when opening message in a new tab
Message context menu could not be opened using keyboard
Custom folder colors did not apply until after restarting Thunderbird
Auto-enabling and auto-disabling of E2E encryption did not behave as expected under certain circumstances
Thunderbird sometimes froze when switching quickly between tabs with S/MIME messages
In the compose window, switching identities in the "From:" field using a mouse did not work; full identities were not displayed
Progress dialog did not appear for manual retry of saving IMAP messages to Sent, Draft, or Template folders
Chat conversation names were not shown
After restarting Thunderbird, all-day to-do tasks changed to tasks set at midnight of the same day
Window decorations did not appear under certain circumstances for dialogs on Linux
Various visual and UX fixes and improvements
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"Get messages" and "New messages" buttons can now be individually hidden from the Folder Pane
Drop-down buttons in message header could not be activated using Enter or Space
Drop-down button of "Reply All" button was not available in message header
Creating too many filters in the Filter Editor caused the list view to overflow without scrolling, making overflowed filters inaccessible
Archive button did not work on collapsed threads
News reader did not always issue GROUP command after authentication with remote server, preventing Thundebird from displaying or refreshing news from the server
Adding too many terms to an Advanced Address Book Search caused the list view to overflow without scrolling, making overflowed terms inaccessible
Various visual and UX fixes and improvements
Moving or renaming a mail folder caused sub-folders to disappear
Incorrect message was used for reply/forward if a new message arrived while reading a message
Folder Tree performance improvements
Previously hidden folders were visible in Unified Folders mode
RSS and News accounts were not included in Unified Folders mode
Columns in some list displays could not be resized
Switching to Unified Folder Inbox with larger profiles caused high memory usage and considerable delay
Mail tabs did not immediately update to reflect new contact display name preferences
OpenPGP status in message reader did not update when switching to new messages
Thunderbird did not check for recipient S/MIME certificates in some cases while encryption was enabled
Attachment icon incorrectly displayed for multipart emails
"Insert Image" dialog box did not resize to accomodate preview image, hiding dialog buttons
Screen readers did not consistently communicate the selected message when navigating message list with "Page Up", "Page Down", "Home", or "End"
Events and Tasks views in Today Pane could not be resized when using split mode
Encrypted Subjects on OpenPGP messages were not displayed until the message was displayed
"Compact Folders" menu item was not enabled when the account itself was selected in the folder pane
Context menu items (copy/cut/paste) were missing from Quick Filter bar
"Copy to Folder" menu item was not enabled when viewing an opened .eml file in a standalone window
Subfolders did not expand when dragging messages to folder pane
A "Learn More" link was missing from the "Do not track" option in "Privacy & Security" Settings
Window control buttons (minimize, maximize/restore, close) were displayed out of order on Linux configured to use reversed placement
Folder pane header buttons were spaced too far apart with a wide folder pane
Unified Toolbar "Compact" button did not work
Quick Filter bar visibility and performance improvements
Unified Folders view fixes: Missing folders restored, searched folders did not refresh when subfolders were added
Some new/unread messages were erroneously marked as read
Send Progress dialog only displayed as a title bar
Creating OpenPGP keys with no expiration was not possible
About dialog layout fixes; restored display of distribution.ini information
Extra linebreaks in Google Calendar event descriptions removed