So basically the only real game left in town is Firefox.
There's a few "de-Googled" Chromium based browsers but there's debate as to how de-Googled they actually are, consensus is there is still some Google in them.
All other Firefox based browsers have too small of a user base that you basically get uniquely browser fingerprinted and tracked across sites, same applies for the Chromium derivatives.
So it's either Firefox or Tor Browser. I've been using TBB as a daily driver for over a year now, if you take TBB and disable the Tor network (and say make it use a VPN instead) it's basically a really souped up and hardened Firefox that works really well.
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