Thunderbird 154.0 (64-bit)

What's new in this version:

New:
- CMS message with AuthEnvelopedData can be decrypted properly in Thunderbird
- Global search results can open in list view by default with new setting
- Optional system tray mode that hides Thunderbird when the last window closes
- Support for dragging message/rfc822 type MIME attachments to folder tree
- Microsoft Graph enabled for Microsoft 365
- What’s Fixed:
- Remote content warnings appeared despite sender block exceptions being applied
- Collapsed saved-search folders did not deselect their subfolders
- Server-designated special folder flags could be removed until restart
- Messages could render excessive trailing blank lines
- Copying a message subject included the "Subject:" label in copied text
- Moving IMAP folders to Local Folders could delete messages after copy failures
- 7-bit clean unobtrusive signature payloads were unnecessarily base64 encoded
- DisablePasswordReveal policy failed to prevent revealing saved passwords

Fixed:
- Account setup tried local-part usernames before full email addresses
- Read-only CardDAV address books were incorrectly treated as writable
- Autoscroll icon was missing directional arrows in scrollable messages
- Blank 1970-dated messages could appear from incomplete message file copies
- Opening drafts or templates with invalid quoted-printable data could crash Thunderbird
- Thunderbird could crash when inserting a message header into database cache
- IMAP repeatedly notified for messages already read on another device
- Dragging EWS search folders to Trash caused Thunderbird to crash
- Folder compaction displayed incorrect disk space recovery estimates
- Custom OAuth settings for EWS account overwrote original account's settings
- Thunderbird could crash when going offline with an active IMAP IDLE connection
- Thunderbird could crash while running online mail search
- Exchange accounts could show repeated false login failures during authentication
- Expired newsgroup articles showed an insecure "click here" purge link
- IMAP attachments appeared empty after messages were moved by filters
- Default special-folder names could reference nonexistent server folders
- New RSS subscriptions used updated dates instead of published dates
- Calendar sort order was not preserved across Thunderbird restarts
- "All calendars are disabled" banner reappeared after enabling a calendar
- Dismissed CalDAV reminders could permanently stop future event notifications
- Read-only CardDAV calendars were incorrectly treated as writable
- CalDAV sync failed when server responses used UTF-16 encoding
- Visual and UX improvements
- Security fixes