Release Notes

Added 'Mark as Spam' and 'Mark as Starred' actions to mail notifications

Account Hub enabled by default for second email setup

Some generic appearance settings were moved from General to Appearance section

Folder cache entries were not cleared when an account was removed

Selecting a folder could fail due to an underlying error

Thunderbird could crash when copying a local folder to IMAP

"File > Save As > Template" and "Reply With Template" filter actions failed

View Message Source no longer worked for multiple selected messages

Creating a new mail account from the menu bar in a message window failed

Feed subscriptions were broken

List-ID contents could be selected but not copied via context menu

Some webpage links could be forced to open in Thunderbird

Thunderbird could crash when scrolling folders using up/down arrow keys

"Secret Key ID" field did not sanitize input, causing draft encryption to fail

Could not send signed/encrypted messages in some setups due to regression

Repaired folders were not reindexed for search after repair

Messages with multiple authors or no author were not indexed for global search

Messages from authors without email address were not indexed for global search

Creating a link from selected text did not work with advanced properties selected

Spellcheck no longer highlighted misspelled words in the compose window

macOS system notifications worked but email alerts could not be disabled separately

Setting different archiving options for multiple identities did not work

Thunderbird could crash in debug build when adding a news account

Moving back in the calendar import dialog could break the Continue button

Add-ons: Optional permission prompts for WebExtensions displayed wrong permissions

Density and Font Size menu item buttons used incorrect icons

Auto-unsubscribed dialog was intrusive, reappeared, and could not be ignored

Thunderbird could show a misleading error message on IMAP login failure

Modal alerts shown for expired articles when downloading news for offline use

Status bar message did not include newsgroup name along with the account name

Reconnecting to an NNTP server was potentially not possible

"About" dialog incorrectly displayed "Daily" rather than "Beta"

Links in calendar event description were unreadable in dark mode

Clicking a 'mid:' link in event created from message did not work

Unable to subscribe to more than one network calendar

Visual and UX improvements

Security fixes

Passwords are not remembered in 32-bit MAPI use without a compose window