Mozilla Release Notes

Changed

• RNP command-line utilities are no longer included with Thunderbird

• Thundermail built-in add-on updated to v2.0.16

Fixed

• Ctrl+Shift+K could fail to open the Quick Filter UI

• Nested S/MIME signed parts could fail to render

• Thunderbird could hang when waiting for IMAP server greeting during account setup

• Gmail OAuth2 authentication could intermittently fail on Windows

• AppUpdatePin policy did not prevent Thunderbird from updating beyond pinned version

• "What's New?" linked to Release channel notes instead of ESR release notes

• Security fixes

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

What’s New

• Enterprise policy DisableChat disables Thunderbird Chat functionality

• Enterprise policy DisableFileLink disables Thunderbird FileLink functionality

Changed

• Preference mailnews.headers.minNumHeaders has been removed

• Allow viewing remote content in OpenPGP messages encrypted with integrity protection

• RNP command-line utilities are no longer included with Thunderbird

• IMAP/POP manual config port field is now optional

• Thundermail built-in add-on updated to v2.0.16

Fixed

• Ctrl+Shift+K could fail to open the Quick Filter UI

• Message list could show the wrong sender for messages

• Status bar could remain active and cause 100% CPU usage after activity ended

• OpenPGP discovery failed to find replacement keys after a key was revoked

• Valid RSA OpenPGP keys could be rejected, preventing encryption

• Sent messages could silently fail to save to the IMAP Sent folder

• Sending message did not fail gracefully with malformed references header

• Thunderbird could hang when waiting for IMAP server greeting during account setup

• Account Hub account creation could fail with malformed URI

• Custom OAuth Endpoint Host incorrectly required a full URL instead of a domain

• Message filters could falsely match when evaluating search term failures

• CardDAV address books could fail to sync when no password prompt was needed …

Fixed

• Detached attachment links were truncated when folder path contained &

• Save All, Detach All, and Delete All failed after deleting one attachment

• Blank 1970-dated messages could appear from incomplete message file copies

• Forwarded messages could display incorrect encoding

• Manual Get Messages failed after startup until toggling offline mode

• Thunderbird could crash on shutdown while waiting for OAuth2 password entry

• Security fixes

As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla

What’s New

• OpenPGP key properties can print debug information to the Error Console

• External browser login flow enabled for Yandex

• Custom OAuth support for issuer ID and client secret field for IMAP and POP3

• Custom OAuth support for POP3

• Enterprise policy DisableUpdateSettings prevents users from changing update settings

• Enterprise policy DisableDataCollectionSettings prevents users from changing data collection setting

• Enterprise policy DisableMessageForwardingFilters prevents message filters from automatically forwarding messages

Changed

• Preference mail.offer_experimental_features renamed to mail.experimental_features_settings.enabled

• Thundermail built-in add-on updated to v2.0.11

Fixed

• Detached attachment links were truncated when folder path contained &

• Opening a PDF attachment in a tab displayed empty tab

• POP3 folders with names over 55 characters could become duplicated after upgrading

• Folders with invalid filename characters could show hashed names if cache was lost

• Save All, Detach All, and Delete All failed after deleting one attachment

• Renaming folders could reset folder settings

• Subscribing an IMAP folder and subfolder together failed to subscribe the subfolder

• Some newly fetched POP messages were not marked with new star after startup …