Release Notes

Thunderbird Desktop

Version 68.3.1 | Released December 16, 2019

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.

** Thunderbird version 68.3.1 provides an automatic update from Thunderbird version 60.** If you have installed Lightning, Thunderbird's calendar add-on, it will automatically be updated to match the new version of Thunderbird. Refer to this Calendar troubleshooting article in case of problems.

System Requirements: • Window: Windows 7, Windows Server 2008 R2 or later • Mac: Mac OS X 10.9 or later • Linux: GTK+ 3.4 or higher. Details here.

Please refer to Release Notes for version 68.0 to see the list of improvements and fixed issues.

What’s Changed

changed

In dark theme unread messages no longer shown in blue to distinguish from tagged messages

changed

Account setup is now using client side DNS MX lookup instead of relying on a server.

What’s Fixed

fixed

Searching LDAP address book crashed in some circumstances

fixed

Message navigation with backward and forward buttons did not work in some circumstances

fixed

WebExtension toolbar icons were displayed too small

fixed

Calendar: Tasks due today were not listed in bold

fixed

Calendar: Last day of long-running events was not shown

Known Issues

unresolved

When upgrading from Thunderbird version 60 to version 68, add-ons are not automatically updated during the upgrade process. They will however be updated during the add-on update check. It is of course possible to reinstall compatible add-ons via the Add-ons Manager or via addons.thunderbird.net.

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