از این افزونه که اسمشو مینویسم استفاده کنید خیلی بهتره و همون صفحه ترجمه میکنه.
Translate Web Pages
https://addons.mozilla.org/en-US/firefox/addon/traduzir-paginas-web/?utm_content=addons-manager-reviews-link&utm_medium=firefox-browser&utm_source=firefox-browser

Add a feature to work without opening a new page

Funciona bem, mas está por meses inutilizável com o firefox em pt-br, embora a meses atrás já tenham aberto uma issue no github. Tem um commit bizarro lá que alterou todos os rótulos pt-br.

Doesn´t work plus no icon visible!

Très pratique !
Fonctionne parfaitement sur la version 89 de Firefox...

It's beautiful that something so simple can make life so much easier ^^ Twenty years ago I kept an English-Polish dictionary under my monitor xD