Rated 5 out of 5 stars

It works really well, no more copy/paste and opening up a dictionairy in a second tab for me! (for english is not my native language). Amazingly fast and smooth too, especially if you consider it gathers its information from different websites. A thesaurus would be a great addition. Thanks for creating this.

This review is for a previous version of the add-on (2.5.1-signed). 

Thanks for your encouragement! Do try out version 2.6, which has 3 different thesauri.