Rated 1 out of 5 stars

Not compatible with multiprocess

This review is for a previous version of the add-on (2.1.0). 

That isn't true, e10s is supported. But because Mozilla decided anyhow to ruin classic add-ons ecosystem in a next few months I just see no reason to explicitly indicate multiprocess compatibility.

PS: Do you actually hoped to inspire the development by such 1-star review? That's funny.