Firefox, something Firefox based or something entirely other?
Firefox because nothing has blocked ads as well as Ublock Origin has. DNS is for other apps but for browser Firefox has been king.
Firefox, because it is not chrome based.
Firefox, with ublock origin and yt high definition plugins, so I can have a decent yt player. I have disabled/hide chrome, I have no need for it.
Mull. Hardened Firefox with uBO.
Fennec, which is a Firefox clone, and I use it because it allows (allowed) me more customization than the default Firefox.
This: Fennec has better security configuration than Firefox about:config settings in regards to telemetry and whatnot.
Mull is also great! Even more secure and better at stopping phoning home, telemetry, and fingerprinting. Though, Mull tends to break quite a few websites. I use Mull, and switch to Fennec selectively when Mull doesn’t work