Apparently you need to follow your own advice and do a search because it takes 30 seconds to see they are collecting data from their search engine not the browser. So if you don’t use their search (which is pretty shit anyway) it’s not relevant to the browser side of things. The browser is completely open source and everyone can see what the code is doing.
And isn’t using search data to improve search results a pretty reasonable usecase for AI? Seems like a nothing burger. For the record I use librewolf but I find the constant Brave hate to be undeserved.