I've been a Firefox die-hard since it was called Phoenix a couple decades ago. That said, over the last two months I've been testing Orion Browser (from Kagi, to which I subscribe), and am smitten with it. It's Apple only at the moment, which is a drawback, but if you live in that ecosphere, it's worth a look.
Orion is Webkit-based, can install extensions from Chrome OR Firefox, privacy respecting, and a whole lotta niceties for per-website tweaks and other customizations.
replies(3):