So if you really want to disrupt Google's control over the web platform the only options are really Firefox and Safari.
Google's issue if the leverage they have by having Chome used. If it is just a derivative then that lessens their leverage because the vendors of those derivative browsers do have the option of modifying Google's choices.
But if you disagree, then yes, sure: use Firefox.
Firefox unfortunately does not have the numbers on their side nor will they seemingly risk their Google payout deal. At this point, if you're using it, you're doing it because it has specific features or extensions you want, or you believe that it's ethically the right choice and you're comfortable with the trade-offs.
(I love Firefox, I just think we need to be realistic here)
Edit: I will actually note, in thinking after posting this comment, that it wouldn't surprise me if Apple was actually down for this proposal. Sigh.
On HN people are more likely to complain about Safari existing and demand Chrome everywhere.
The main complaints I still see are related to the (likely illegal) lack of support for third party browsers, and missing web APIs for things like push notifications. Those are still valid complaints today though, for anyone who cares about them.