What’s New
• Visual signatures can be added to PDF attachments opened in Thunderbird
• 'Copy Message Link' and 'Copy News Link' added to header pane 'More actions'
• Folder copy enabled within mail server accounts and local folders
• 'Reset Folder Order' option added to folder pane to reset custom folder sorting
What’s Changed
• 'Copy Message Location' removed from mail context menu
What’s Fixed
• Users with attachments open in tabs saw an error on Thunderbird restart
• Notification sounds did not respect operating system's do-not-disturb mode
• Non-English localized Thunderbird created English special folders on first start
• Users were unable to use Fastmail calendars due to missing OAuth settings
• Sending from unified or local folder failed if no default account was set
• Right-clicking 'List-ID' -> 'Unsubscribe' created double encoded draft subject
• On Linux, the close caption button was inactive when mouse was in screen corner
• Toggling dark message mode did not restore focus and scroll position
• Message list scrolled back when returning to mail tab after opening a message
• Deleting a single message in folder using 'Group by Sort' failed after CTRL+A
• New newsgroups were not added in alphabetical order by default
• After updating to version 142, all newsgroup folders were sorted alphabetically
• With Thunderbird closed, clicking a 'mailto:' link to send signed message failed
• Replying could fail with mailnews.reply_quoting_selection.multi_word set false
• Multiple saves while using 'Options' -> 'Send a Copy' resulted in multiple copies
• Thunderbird did not display contact photos in WebP format from CardDAV servers
• Installations from Microsoft Store did not open when clicking 'mailto:' links
• Clicking the backspace icon in the quick filter field cleared the input field
• Initial launch had long load times and UI lag while messages downloaded
• 'Mark' -> 'All Read' affected newsgroup messages that had not been fetched yet
• Thunderbird could not reconnect to newsgroups after connection loss until restarted
• Sending a newsgroup post appeared successful when it had actually failed
• Archived RSS feed messages were sent to the archive folder of default identity
• Opening Website header link in RSS feed incorrectly re-encoded URL parameters
• Visual and UX improvements
• Security fixes