I stumbled upon this by chance and saw a bunch of 1-star ratings, which inspired me to write my own review.
I’ve been using this extension for 6 years now. Pros:
- It quickly translates any text you can select, either by clicking with the mouse or using a keyboard shortcut
- Killer feature: It has seamless two-way language switching. For example, if you’re translating text from Russian to English but at some point need to translate it back, it’ll figure it out on its own and switch the translation direction! Neither Google Translate nor any other service has done this.
- It rarely freezes. Over the past 6 years, I can count no more than 7 days when it froze on its own.
Drawbacks (for beginners; once you know about them, they aren’t annoying):
- If the internet connection drops during a translation, it doesn’t display an error message — it either keeps spinning for a long time or just disappears.
- There’s no description on the homepage of such a cool feature as seamless language switching (see above). That’s their oversight.
That’s all.
To complement other reviews: Pro needed only if you seek for a some extended features. Extension never required payment for using free version. If you are seeing promotion to make it Pro after installation, you at the extension' settings tab, simply navigate to other panes to make appropriate to you settings and close the appeared tab.

ne fonctionne pas sur waterfox pour une traduction de page web

Не переводит страницы Попробовал не сколько раз... - пустышка.

Ask to pay before you can you ever start and without paying its basically useless. Another "pay now and gamble if its good" type of addon which is using AI to translate page into disjointed sentences. In another words a plain scam.

Used to work very well but seems to have stopped working the last few months

Очень доволен, работает без сбоев

Non traduce più le pagine intere, qualsiasi sia la lingua scelta. Peccato perchè era veloce.

Doesn't work and they never reply

Il ne traduit plus les pages entières web

Malgré mon paiement de licence à vie, je n'ai jamais pu récupéré mes accès à mon compte. Je déconseille cette application qui est une ARNAQUE

Не работает в мобильной версии браузера

Не работает. Сразу оплату просит.