Giving only 3 stars as somehting has changed in version 4.0.6, Mac OS 10.11.6, Firefox 78.4.0esr (64-bit) Right clicking selected text brings up the translation window but the window is blank with spinning ball. I have to click the + sign for the text to go to a new tab at https://translate.google.com. The small popup window doesn't work. I have removed and re-added the extension w/no luck.
The add-on was perfect until just a day or 2 ago. :(

Doesn't work with uBlock/uMatrix

No puede traducir paginas WEB completas!

Pros:
1. It works. Almost.
Cons:
1. Doesn't work in text input fields.
2. Doesn't work in txt files.
3. Move you to a new page each time for reading a translation or listening a pronunciation. It is not what I want when trying to translate a single word.
4. The interface with submenu is not too handy, when it take up to translating many small fragments of text on the page.

我想要能够翻译整个页面的翻译器，就像Microsoft Edge Beta一样。

It is a good plugin. But I think the following plugin has better performance and easier access for translation and is much like Google Translator itself. Of course, this is a personal opinion. I communicated more with this
Plugin Name: Page Translator by Fire360Boy

traduit de pages entières, ce qui est moins intéressant que traduire une sélection. Je préfère IMtranslator, par habitude et efficacité

I select a word, click the icon, and a blank page opens. Removed and reinstalled. Same result. I was ready to rate it a 1 -- BUT control shift 1 works! So I'll give it a 3 instead of a 1. It half works.

Please Google, add auto-reverse transaltion in little windows, when you press hotekey. Very fast but for example i want to translate from my eng to my lang it's ok, but if i want to do opposite, i can do it unless i do it myself in navbar

พอใจ

Me era de gran utilidad para traducir rápidamente palabras o frases que no entiendo cuando leo otros idiomas, pero desde hace unos días no logra mostrar los textos y tengo que ir al trductor de Google desde la app (+) No se si es problema de la aplicación o de Firefo

It works ok, but why would you add popup option if it can't be closed with esc key?