“Unlike cloud-based alternatives, translation is done locally in Firefox, so that the text being translated does not leave your machine.”
Firefox 118 translates web pages on your own computer, built on the EU’s Bergamot research project. Every cloud translator reads whatever you feed it. The same release hides all but system and language pack fonts from websites in Private Browsing to blunt fingerprinting. Mozilla shipped real privacy features and still found room to put add-on suggestions in the US address bar.