this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Carsten Schoenert <firstname.lastname@example.org>
Date: Thu Dec 12 20:16:06 2019 +0100
d/control: correct depending versions
The dependencies are missing the epoch for thunderbird and lightning.
https://salsa.debian.org/api/v4/projects/webext-team%2Feas4tbsync.git%2F API request failed: 404 Not Found at /srv/qa.debian.org/data/vcswatch/vcswatch line 379.