This was previously available as an add-on, but as of Firefox v118 this add-on is no longer needed as it's now locally in Firefox.

it was touted as something that integrates into the browser, it does NOT. it was advertised as something that translates websites, it does NOT. you'd assume it'd be good enough for basic translations, but strike three you're OUT!

No Japanese language. Useless.

That sounds a good idea IF it can translate properly. I complain myself a lot if translate tools think Portuguese is all the same, which is not.
"Avalie a sua experiência" -> ok (Evaluate your experience)
O que está achando de Firefox Translations? -> not ok, it sounds like Brazillian
Faça login para avaliar esta extensão -> so/so

Trying to confuse a native language (Portuguese Portugal) with a pathetic derived language (Portuguese Brazil) is an huge mistake which needs to be corrected at the beginning.
Google and Microsoft made this mistake and we in Portugal are paying for it.
So to make a good translation tool, it needs to distiguish and separate properly the languages.

Not every website has the icon to translate, for example Reddit

1 for now. Hope you will add Asian Languages like - Korean, Chinese, Japanese. and option to use the translator in chats like twitch chat, for live translations.

I've always been an avid user of the To Google Translate Add-on, but it always bothered me that, despite the Add-on not collecting data, Google does. When I heard about this website translation on-device, I was eager to try it out. Here, I will compare both extensions in terms of their translation accuracy, user interface, translation speed, memory usage, and common issues.

First things first, it is important to highlight that while To Google Translate uses mainly American grammar, Firefox Translations seems to use British grammar. Both extensions perform well when translating texts from German, Portuguese, and Spanish into English, but they both struggle to correctly translate gendered nouns from these languages into English (e.g., "Mitarbeiter*innen" (DE), "funcionários(as)" (PT), "empleados/as" (ES), "employees" (EN)). Both extensions frequently fail to translate between languages other than English. While To Google Translate also struggles with abbreviations and acronyms, Firefox Translations handles them without a problem. To Google Translate tends to provide more literal translations, while Firefox Translations sometimes translates word by word, which is not a smart approach for languages like the ones I tested.

Both extensions have very simple user interfaces that are easy to use, allowing you to select a preferred source language to always be translated. However, Firefox Translations offers a more intuitive and clear interface, while To Google Translate provides options (which must be selected) to translate only a snippet of the page or to show the original text when hovering.

Firefox Translations can translate an entire website with a single click, but I believe that the loading time depends on your device's memory and the size of the page. With 16 GB of RAM, it takes less than a second to load a page with 20 paragraphs of text and a few menus. On the other hand, To Google Translate works on the text visible on your screen, which loads almost instantaneously.

Speaking of memory usage, it's well-known that Chromium-based browsers can be memory-intensive. After opening my browser and loading my homepage in German, memory consumption stabilized around 740 MB. Activating To Google Translate increased memory consumption to 780 MB. Performing the same procedure with Firefox Translations raised memory consumption to 1030 MB, which is understandable since it runs locally.

Both extensions face a similar issue with text formatting, such as removing bullet points and adding spaces before commas. To Google Translate also frequently fails to capitalize letters. While browsing one of my work websites, Firefox Translations deleted a menu both from the interface and the developer tools. This issue occurred only at said website.

Overall, I'm still using To Google Translate until Firefox Translations improves its sentence comprehension and stops deleting menus from websites crucial to my workflow. However, I find the slight time delay when using Firefox Translation to be acceptable considering the significant privacy benefit. I have high hopes for this add-on as it continues its beta testing.

Wow, that's nice, so close to DeepL, sometimes even better! I like it!

Já não traduz página web completa!
A barra de tradução não aparece?

Chinese please

I'm living in a foreign country, so the ability to quickly translate many webpage is crucial to me.

I use chrome for many year and the translation there is amazing.

I migrated to firefox this week and but was very disappointed with this extension, and unfortunately I will go back to Chrome.

The biggest differences are, that unlike Chrome, if you want to translate a page using this extension:
1. you need to to several clicks (like choosing a language).
2. the translation itself is much slower than chrome.
3. when navigating between paged of a website, you need to constantly click the translate.
4. 30% of the times, clicking "translate" doesn't work.

Es el único feature que me hacía falta para estar siempre en firefox

doesnt translate devops, only the surrounding header, not the content which is the bit you want :)

Good for what it is but definitely wish there was more support for non-European languages

It take a bit longer that other google translator backed addons but still happy to use Mozilla product.

On feature request though: Ability to translate only selected texts.

Easy to use and works well.

Like it that i don't have to use untrusted addons anymore.
- Please add Bangla language support

It works, but the UI is subpar and the list of languages is pretty weak. I'm not knocking Catalan, but it seems like an odd choice to prioritize over something like Chinese.

Schrott über den man mit Gutem Willen noch lachen kann.