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: Mechtilde <firstname.lastname@example.org>
Date: Sat Jun 8 11:58:03 2019 +0200
added debian/salsa-ci.yml for testing on Salsa
https://salsa.debian.org/api/v4/projects/webext-team%2Ftbsync.git%2F API request failed: 404 Not Found at /srv/qa.debian.org/data/vcswatch/vcswatch line 387.