I want to have the option to select a piece of text and translate without leaving the page I'm on instead of translating the whole page

works fine, if youre learning russian not for memes

I've used the Firefox translator for probably 5 years. As a French teacher and somewhat competent in Spanish, I have found this program to be quite competent.

Traduz magnificamente os sites que estão em outros idiomas, funciona muito bem!

A true alternative to Google Translate, and Bing Translate, hope this goes on.

Мне нравится!

I don't use this add-on because it does not support the languages I need (yet). But the development of this product is crucial and I recommend everyone use it if they can.