Translation is already a part of Firefox and I don’t see too many have complained about this. It is also completely offline, AFAIK. What people are afraid, myself included is agentic AI capable of autonomous web browsing. That is a privacy and security nightmare, as is already demonstrated by openai’s browser, which was exploited the first day it was launched. Beyond translation, I personally am not interested in any other AI features. In fact, I don’t use the translation feature more than a few times a year.