According to
Thunderbird.net, "Thunderbird version 78.0 is only offered
as direct download from
thunderbird.net and not as an upgrade from
Thunderbird version 68 or earlier."
--
https://www.thunderbird.net/en-US/thunderbird/78.0/releasenotes/
What's the plan for Thunderbird in the Fedora repo going forward?
--
-- Steve