Yeah, no. You can’t just say “get rid of Brave and DDG” and then go on to recommend Firefox, the browser that is in bed with Google and is basically just an ersatz (correct way of writing that word btw) of Chrome if you wanna go by your skewed logic.
In reality there is no perfect web browser, and there is also no perfect search engine.
Best scenario if you want better privacy would just be to use the Tor Browser with Searx.