There are people who expect translations like Google's.
Google is a multi-billion dollar company that has the resources to create highly refined products in a short time. That's not to say that doing a translator takes little time, let alone that it's easy.
However I quote a question from a user who gave a star, why does that happen?

"Questions : Why does 'Firefox Translations' connect to [o1069899.ingest.sentry.io] AND TO [incoming.telemetry.mozilla.org] AND TO [storage.googleapis.com], to the latter in particular? What privacy when a Google server is aware that user lambda is calling it?"

i am saeed from iran

Is Japanese not an option? Kind of weird the icon for this add-on features Japanese when it's not a translation option.

mouais... Loin du confort d'utilisation de la solution duckduckgo qui elle est illimitée et se gère de façon plus simple (en gros qd t'as plus besoin du mail, tu le supprimes en 2 clics).

不支持中文

Good but please add more languages and add language detection.

Great extension. Has a better interface than all the other options, and translates entire pages better than the other extensions. Like the feature where it can underline words that it may have translated incorrectly. Also very fast compared to others.

Just wish it had more languages like Greek or Chinese.

I like the idea of local-private translations. Since I discovered this add-on I think I really need it. Now... in the current version translation quality is far away from deepl or even google (checked in en<-->pl). But it isn't important to me as much as easy using of "manual" translation - and now is not comfortable. I have to select text, copy it, click on add-on icon, paste text, press enter in text window, and then I get a translation. Why not just to select the text and click add-on icon, the rest could be done automatically?

If he didn't constantly offer a translation that I don't care about, I might even like him.

Just doesnt hold a candle to extensions like TWP at the moment. Even ignoring the sometimes worse translations or the extension often not recognizing what language is being looked at without refreshing the page, the user experience just feels clunky compared to the competition.

The menu (just like firefoxes ctrl + f findbar) needlessly stretches across the whole screen for no reason. It also doesn't close when you click the addon icon again. I am sure others have named other little annoyances with it. Call it nitpicking but as they say, a death by a thousand cuts. I hope they improve on all of this and will check back in on this extension in the future since ideally I dont want to have to use an extension for something like this in the first place and would love if mozilla perfects this and ultimately adds this natively to FF.

Fast and useful :) I hope next version has an option to specify formal/informal in German.

A big flaw: Cannot undo the translation to show the original without reloading the tab!

Working as intended! Looking forward to translations from Finnish -> English

Works nicely!

Also, the icon shows it translating between a latin 'a' and a Japanese 'a'. which isn't really accurate when Japanese is not a language available for translation. Pretty misleading.

(Edited review; thanks for the tip, developer, sorry for the complaint)