I ended up getting so frustrated with the new version 78 (not just because of the missing add-ons, but also reliability issues with my IMAP connections to the server at work) that I reinstalled the previous version... https://archive.mozilla.org/pub/thunderbird/releases/68.12.0/ That led to this issue with the profile... https://support.mozilla.org/en-US/kb/unable-launch-older-version-profile ... which I was able to work around with the "--allow-downgrade" option... https://support.mozilla.org/en-US/kb/dedicated-profile-thunderbird-installat... After that, it was just a matter of reinstalling my old (pre-upgrade) add-ons that had gotten updated or simply deleted (e.g. Lightning). I've disabled automatic-updates now, of course! Gilbert On 2020-09-15 9:18 p.m., Bradford C. Vokey wrote:
*** WARNING ***
Anyone running Thunderbird 68.x.x , please be aware, automatics upgrades to 78.2.2 have now started.
This is highly likely a mistake by the development team, as the release notes for the latest version 78.2.2 state:
*Thunderbird version 78.2.2 is only offered as direct download fromthunderbird.net <https://www.thunderbird.net/>and not as an upgrade from Thunderbird version 68 or earlier.*A future release will provide updates from earlier versions. Automatic updates are available for users already running version 78.0 or higher.
Add-on support: As of version 78.0, Thunderbird only supports MailExtensions. Your favorite add-ons may not have been updated for compatibility.
*** TURN OFF AUTOMATIC UPDATES TO THUNDERBIRD 68.x.x if you still want to keep your existing extensions working. ***
Further reading:
https://www.ghacks.net/2020/09/15/automatic-thunderbird-upgrade-to-version-7...
-- Bradford C. Vokey
Treasurer Manitoba Unix User Group ===
-- Gilbert E. Detillieux E-mail: <gedetil@cs.umanitoba.ca> Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/ University of Manitoba Phone: (204)474-8161 Winnipeg MB CANADA R3T 2N2 Fax: (204)474-7609