ask and you shall receive (as of firefox 118)

https://support.mozilla.org/en-US/kb/website-translation

if you need a language they haven't developed a production model for yet, you can install the beta version of the add-on, which supports more languages

https://support.mozilla.org/en-US/kb/firefox-translations-ad...

I really hope it's getting to mobile Firefox soon.

… and it’s done locally, unlike the chrome version which uses googles servers.

Some of us handle sensitive content that must not be uploaded to Google.

Oh nice! Good to see they are working on it. Unfortunately it's only for 8 European languages to far, and the beta version only adds 4 more.

I need Vietnamese. I guess I will have to wait another few years for that. But still, it's progress.

I wonder if they will add the option for cloud providers. While I love the idea of the added privacy of doing it locally, pretty much everything I'm translating is publically available so privacy is not important to make compared to the quality of the translation.

It's build into Firefox. If you're on a page not in your default language, a translate icon will appear in the URL bar. Click, done :)

Yeah, I see they added that in the last but one release. However it's only for a tiny number of European languages, and not the one I need which is Vietnamese.

Shame, though I'd watch that space because I think they're adding more languages.

I use this extension, it even lets you highlight text and translate just that too.

https://addons.mozilla.org/en-US/firefox/addon/traduzir-pagi...

Wow, thank you! That actually works really well.

I've tried quite a few firefix translation extensions and all of them either open a new tab or a popup, this is the first one I've seen that translates in place.

OK, sold. Switching to Firefox today :)

Afaik they do have an official offline translation extension Forefox Translations that would cover your usecase(maybe) Ff also does have a Translations setting in their settings page(not sure if it's by default or appears when you install the extension) and you can predownload some offline language packs.

The latest Firefox now has that functionality. Firefox translations also have the added benefit of being 100% on-device, your data doesn't have to go to a Google server somewhere.

... for an extremely limited number of European languages. Great to see progress though.

Yup - it's definitely not perfect yet. Getting there though :-)