Thunderbird 133.0 (64-bit)

What's new in this version:

New:
- Support dark reader for the message pane

Changed:
- Removed obsolete preference extensions.overlayloader.loglevel
- Increased the auto-compaction threshold to reduce frequency of compaction
- Display junk state and allow toggling it from top of message context menu
- Subscribe/Unsubscribe buttons were removed from the IMAP subscribe dialog

Fixed:
- Fixed startup crash related to mailbox parsing
- Folder corruption could cause Thunderbird to freeze and become unusable
- IMAP could crash when reading cached messages
- Enabling "Show Folder Size" on Maildir profile could render Thunderbird unusable
- Folder compaction was not abandoned on shutdown
- Recently deleted messages could become undeleted if message compaction failed
- Message corruption could be propagated when reading mbox
- Messages corrupted by folder compaction were only fixed by user intervention
- Reading a message from past the end of an mbox file did not cause an error
- View -> Folders had duplicate F access keys
- Total message count for favorite folders did not work consistently
- Collapsed NNTP thread incorrectly indicated there were unread messages
- Disabling "Grouped by sort" while group header selected could break message pane
- Switching from "All", "Unread", and "Threads with unread" did not work
- Navigating to next unread message did not wait for all messages to be loaded
- Folder compaction did not clean up on failure
- Add-ons adding columns to the message list could fail and cause display issue
- Could not open attached file in a MIME encrypted message
- Unable to send an unencrypted response to an OpenPGP encrypted message
- Remote content notifications were broken with encrypted messages
- Updating criteria of a saved search resulted in poor search performance
- Drag and drop of OS folders as attachments was not prevented
- Unable to generate QR codes when exporting to mobile in some cases
- Opening the Account Manager produced console error
- Account creation "Setup Documentation" link was broken
- QR codes were not scannable by Android app when using most high-contrast themes
- Operating system reauthentication was missing when exporting QR codes for mobile
- New mail notification was not hidden after reading the new message
- Windows "Notifications & actions" did not display the Thunderbird icon
- "Empty trash on exit" and "Expunge inbox on exit" did not always work
- Message could disappear after moving from IMAP folder followed by Undo and Redo
- Global database did not work immediately after update to Thunderbird 133
- Drop-downs may not work in some places
- Primary password prompt cancellation during mobile export was confusing
- Calendar display times could be incorrect
- Selected calendar day did not move forward at midnight
- Could not drag all-day events from one day to another in week view
- Calendar could show mixed languages in month display
- Calendar displayed incorrect first day of the week
- Visual and UX improvements
- Security fixes