Thank you for this..

perhaps you can make addons also a microsoft translator or translate.com?

It's perfect! Not like those other sorry excuses for translation extensions that open a new tab. Ain't nobody got time for that!

Only pop-up dictionary add-on found good for firefox-57

excellent add-on

works perfectly

great for instant translation

The best dictionary/translator for firefox

Sorprendentemente rápida y funcional

its helpful

good addone

This one is just great

This extension is very useful. The floating bubble make the translation so easy. If you are looking for a simple and easy to use dictionary, i would like to recommend this one. Thank You!

Una extensión muy buena e indispensable.

Great so far!!!

It's OK.
Need to option to use as a dictionary - typing word to translate,not only pop-up to translate selected's word. (as google translate on chrome or Instant translate)