Rated 5 out of 5 stars

per syldub el ago. 14, 2017 ·

Do you plan to use WebExtensions in a future release?

This review is for a previous version of the add-on (0.1.3.1-signed.1-signed). 

per jmozmoz (desenvolupador) a ago. 22, 2017 ·

Sorry, but at the moment I do not see a possiblity to port this to WebExtensions.

So this will soon become a Thunderbird only-addon.