some friends have pointed me at qutebrowser which is easily the most well thought out and vim-nerd friendly browser I've seen in years but it's also based on the QT browser widget which means it's rooted in chromium and at the moment the only piece of software I use for political reasons is Firefox. I don't like just conceding the web to Chrome, but hnng the QT folks have done some REALLY QUITE COOL THINGS with this browser.
If you ever used a vim browser plugin, especially Pentadactyl, then you'll know what it's shooting for but because it doesn't have to be a total conversion of Firefox it can be a lot smarter and cleverer, it's got a nice plugin ecosystem and the stock UI can be coerced to do a lot of useful things easily.
I may end up switching to it, I've had vimb installed as a secondary browser for small tasks that I want to break out from Firefox like code doc lookups and opening chatroom links but it's based on WebKit and it is starting to smell.