Thunderbird Beta Notes

Version 67.0beta, first offered to channel users on April 2, 2019

Check out "What’s New" and "Known Issues" for this version of Thunderbird below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the complete list of changes in this release.

These release notes apply to Thunderbird version 67 beta 1 released April 2nd, 2019.

What’s New

  • changed

    ADD-ON SUPPORT: Restartless add-ons continue to work if their authors have made the necessary minor adjustments. Non-restartless legacy add-ons using XUL overlays are only supported if add-on authors have adapted them. Apart from Lightning/Calendar there are a few that have been adapted, like "ThunderHTMLedit", "Compact Header", "Signature Switch" and "Send Later".

  • changed

    DICTIONARY SUPPORT: Only WebExtension dictionaries are supported now. Both addons.mozilla.org and addons.thunderbird.net now provide WebExtension dictionaries.

  • changed

    Improvements when entering, selecting and removing recipients in the Write window

Known Issues

  • unresolved

    Malfunction when deleting a message opened in a tab or stand-alone window

  • unresolved

    Thunderbird 67 beta may not recognise an existing profile. Workaround: start with the profile manager option -p.

  • unresolved

    Thunderbird 67 beta may display a message "You've launched an older version of Firefox" and will not allow opening a specific profile. Workaround: start with option --allow-downgrade.

  • unresolved

    Due to changes in the Mozilla platform profiles stored on Windows network shares addressed via drive letters are now addressed via UNC

  • unresolved

    Spellcheck marks disappeared erroneously for words with an apostrophe (working in Thunderbird ESR)

  • unresolved

    Calendar: A localized version of Provider for Google Calendar not available at addons.thunderbird.net or the Mozilla FTP server. A US-English version can be downloaded here. The XPI file needs to be installed manually in Thunderbird.

  • unresolved

    Chat: Twitter not working due to API changes at Twitter.com