All Browsers are going this route using AI so it's not only Firefox. Those other browsers will go this route as well. If your not a hacker or malware creator then you only one you need to worry is yourself.

Seems like there are some confusion or misunderstanding because Mozilla made a terms of use for Firefox for the first time. https://blog.mozilla.org/en/products/firefox/firefox-news/firefox-terms-of-use/

UPDATE: We’ve seen a little confusion about the language regarding licenses, so we want to clear that up. We need a license to allow us to make some of the basic functionality of Firefox possible. Without it, we couldn’t use information typed into Firefox, for example. It does NOT give us ownership of your data or a right to use it for anything other than what is described in the Privacy Notice.