Лучшее дополнение для перевода из опробованных. Без лишних наворотов. Простой и быстрый доступ к переводу и автоматическое переключение языков. Работает без нареканий.

Please add the functionality:
1) Make a choice of translator: Google or Yandex.
2) Translate all the old pages in the same tab, not in a new one. This is done by the plugin https://addons.mozilla.org/ru/firefox/addon/traduzir-paginas-web/

Better than the official app, but need some additional settings if I want to translate from English.

A melhor que já usei no Firefox!!

it is the fine extension. i dunno why it is still not in the recommend list. came here from "to google translate" extension that is out of service anymore. thanks for your efforts