Good

This addon works great, but I wished there was an option to disable popup on text selection, as well as all other page-related stuff which in fact slows down the browser (Speedometer benchmark shows 1.0 point decrease with this addon enabled).

Ideally, I would like this addon to not interact with the page at all until I deliberately click the addressbar icon, thus granting the page access and requesting the translation.

Перевод от гугла(англ. >> рус.) неправильно работает(неправильно переводит слова на странице), а другие переодически зависают, приходится перезагружать.
Google translation (English >> Russian) does not work correctly (incorrectly translates words on the page), and others periodically freeze, you have to reboot.