- Firefox can translate a whole web page without sending its text to a server.
- The translation happens on your device, so it can even work offline.
- It now works on desktop, Android and iPhone.
- iPhone support began with three languages, now covers five.
- Desktop and Android now translate Chinese, Japanese and Korean too.
Firefox can translate a whole web page without sending any of the text to a server. Mozilla, the company that makes Firefox, says the translation happens right on your own computer or phone. That means nobody outside your device ever sees the page you're reading.
Mozilla turned this on for desktop users in Firefox 118, released in September 2023. The company built it with help from Bergamot, a translation research project paid for by the European Union. Firefox's release notes for that version say the text being translated never leaves your machine.
Firefox for Android got the same on-device translation in version 127, released in June 2024. Firefox 135 for desktop, out in February 2025, added support for pages written in Simplified Chinese, Japanese and Korean. It also let people translate into Russian for the first time.
Once Firefox downloads the language model it needs, it can keep translating pages without an internet connection. Mozilla says its engineers built the feature to translate only the part of a page you're reading. That saves memory and battery on phones, instead of translating the whole page at once.
Firefox 146 translation blog post
Firefox for iPhone got on-device translation in version 146, released in December 2025. Mozilla started the iPhone rollout with German, French and Japanese, then added Spanish and Portuguese a week later. Mozilla says more languages are coming soon.
