Beta Notes

**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

Attachment pane of Write window no longer focussed when attaching files using a keyboard shortcut

Navigation of attachments in Write window

Insufficient contrast between forground and background colors for some tagged messages

IMAP offline folder selection not working

Installation problems on 32-bit Windows

Customising From address breaks saving draft and sending message

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

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

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.

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. The XPI file needs to be installed manually in Thunderbird.

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