does the job but no e10s Rated 4 out of 5 stars

Wish you could make an e10s version, other than that the add is great.

This review is for a previous version of the add-on (10.36). 

ImTranslator for e10

The extension version compatible with e10s is under development, and will be available soon.
In the meantime, you can try our Translation Comparison extension which is e10s compatible: