Download Mozilla Thunderbird 67.0 Beta 1

The Mozilla Foundation has released a beta of Thunderbird version 67.0. Mozilla Thunderbird is an open source email and newsgroup client, with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable look and feel. In Thunderbird, new functionality is rarely added. In version 67.0, the following changes and improvements have been made:

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”.
• DICTIONARY SUPPORT: Only WebExtension dictionaries are supported now. Both addons.mozilla.org and addons.thunderbird.net now provide WebExtension dictionaries.
• Improvements when entering, selecting and removing recipients in the Write window

Known Issues

• Due to changes in the Mozilla platform profiles stored on Windows network shares addressed via drive letters are now addressed via UNC
• Spellcheck marks disappeared erroneously for words with an apostrophe (working in Thunderbird ESR)
• 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.
• Chat: Twitter not working due to API changes at Twitter.com