Review for German dictionary (de_DE) by Manfred Staat
Rated 5 out of 5 stars
Perfect, the Germany "Wörterbuch" works already for the Thunderbird 60 beta version while I am waiting for the English versions to move from 52 to 60 for weeks.
This review is for a previous version of the add-on (20180409).To create your own collections, you must have a Mozilla Add-ons account.