Release Notes — Thunderbird

Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla.
System Requirements: Details
Quick filter responsiveness has been improved
ExtensionSettings policy installs add-ons from update_url when install_url not set
Copy Link Location only copied detached attachment filenames instead of full paths
Thunderbird could crash while performing a Body search
Attach File dialog failed to open when the previously used folder was unavailable
Troubleshooting falsely reported crash reports were not configured when available
Right-clicking inline images zoomed them instead of opening the context menu
Switching to Unified Folders could leave All Folders enabled and not change view
Archived Inbox folders ignored localized names and appeared as "INBOX"
OpenPGP key management had unlocking, handle leak, and protection state issues
OpenPGP backup password text could not be copied and context menu was transparent
Quick Filter failed to match accented names when searching without accents
Holding Ctrl+Enter could unintentionally confirm the send prompt and send duplicates
Plain-text inline forwards omitted signatures placed below the quote
Remote content exceptions without a scheme only applied to HTTP, not HTTPS
Remote content exceptions incorrectly allowed wildcard hostnames like *.example.com
Saved CalDAV/CardDAV credentials could be forgotten after restarting Thunderbird
CardDAV setup failed without prompting for a password
CardDAV address book sync failed to fetch newly added contacts
CardDAV updates could corrupt vCard REV timestamps
CardDAV discovery could fail on valid multi-status responses with mixed status codes
SMTP Kerberos authentication failed on Linux with STARTTLS
POP accounts repeatedly showed connection errors when Thunderbird started offline
Matrix SSO with Save Token disabled reopened the login flow indefinitely
RSS filtering could lose tags and stall processing of later feed items
CalDAV password prompts did not identify the username or calendar
Calendar event edits could fail with localization error in the event dialog
Updated calendar credentials were not saved from the authentication prompt
Visual and UX improvements
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