Have you heard about qutebrowser, Luakit, and Nyxt?

I like qb the most, as it's fairly stable and fully-featured. It offers full keyboard control, and many cool features like bindings for host-granular permissions for js and images, and is also scriptable. Built-in decent adblocker.

The main annoyance about it for me is it doesn't come with DRM, but it could also be seen as a feature, because it saves me a lot of time I'd otherwise watch arguably crap content.