Translation and pronunciation of a word when highlighted in Mozilla Firefox, Ubuntu?

Question

Machine translation from one language to another

Hey!
You need something like the following: I look at the page in the browser, select an English word, some small context menu appears (preferably) and it contains a translation with pronunciation. Is there something similar for Mozilla? I put a certain "Slovouch", but now their site does not work, it's impossible to log in. Again, it is desirable that the dictionary is normal, so that it correctly translates those. terms.
If you can put another browser, where there will be something cooler - write.

Answer 1

I use the extension from LinguaLeo