I search to ask if brave built their own index. Relevant results up top, then I’m getting CNN article about Fox’s right word shift, and all kinds of other completely unrelated items. Incidentally they all were interesting sounding (clickbait) and I found myself reaching these unrelated articles. It was a bit like browsing Reddit, except this is a search engine and I had a very specific yes/no question.
I believe that in the address bar you should get an icon to set the current site as a search provider when you're on it. On Firefox it's in the more menu at the right end of the bar.