Even in a compromised state, if given the choice between Firefox and Brave, I would choose Firefox 10 out of 10 times. A closed source chromium fork put out by a business that still isn't sure what its business model is and already has a fair number of "whoopsies" under its belt is a complete non-starter for me.

That is, given the choice between Firefox and Brave. For what it's worth, my current browser is Zen, and I'm quite happy with it.