For Readers in foreign Languages Rated 5 out of 5 stars

one of the most useful addons for FF.
Doubleclick on Word and translation pops up in a configurable window.

Most important Question:
Will it work after FF57?

Rated 1 out of 5 stars

Can't give it more than one star.

Wrote nicely email to developer, no response.
it does'nt work on Firefox reading modus.
save to favorites is broken..
mark several words gives error.
I am not willing to open an github account.
Usability: 10%

This review is for a previous version of the add-on (0.3.4.1-signed).