Lack of Transparency / detail / doc Rated 1 out of 5 stars

[en]
I miss a word or two on the add-on in detail - where has this functionality been in the last ten years and why is it not part of mozilla core? Where is Mozilla Sync for Thunderbird??
[de]
Ich schließe mich dem Vorredner an:
Warum so wenige Worte über das Add-On?
Wo bleibt endlich Sync for Thunderbird?