Rated 4 out of 5 stars

Mozilla support says that "All add-ons hosted on addons.mozilla.org undergo this review process in order to be verified and signed", so Why on earth is this extension hosted on this site if not signed?.
Happened on some other extensions (as a curiosity, a little bunch of other dictionnaries hosted here), it seems like if there was an issue on the verification process, which will lead anybody using any of those dictionnaries to *override add-on signing*, which is the same thing as not having that safeguard: Please, please, please Mozilla, keep those dictionnaries out of "addons" or solve the problem, stop confusing us.

This review is for a previous version of the add-on (1.19.1).