cVim (active): https://github.com/1995eaton/chromium-vim
pentadactyl (vimperator fork): http://5digits.org/pentadactyl
It calls itself Emacs-like, but true to Emacs form, one of the default configurations gives Vim-like bindings instead of Emacs ones.
And I am using it with latest firefox with no problem. :)
Vimperator's hinting-mode (press 'f' and start typing text in link to follow a link, and/or type the number -- and while initially all links are enumerated, when you type a few letters, only matching links remain highlighted) -- feels really odd at first, but then just feels great.
I generally use FF for most everything, and reserve chromium for those few poorly designed sites that fights hard against noscript/adblock - like facebook after their move away from input-fields and to js/ajax input (They use it for stuff like changing (part of) a friends name into a mention, etc). And for youtube (mostly because the horrible ui is useless without a mouse anyway, and lets me keep youtube in a window while I browse in FF).
[ed: and occasionally for web dev/debug -- not so much because ff web dev tools aren't good -- mostly because they interact somewhat poorly with vimperator]
For me the reason is the omnibar (short prefixes for search engines, eg. w for wikipedia, ddg for duckduckgo), the developer tools and vimium (ok, I just learned there are similar plungins for firefox), why I use chrome/chromium.
:o g google search term
:o w wikipedia search term
[ed: that works for me, anyway]
[ed2: Just realized that I'm running Debian Jessie (testing) on this box, and was running "stock" iceweasel. But upgrading to Aurora (38) the address bar stays hidden (but there appear to be some other glitches -- that might be because of a mish-mash of libraries between mostly stock Jessie and just pulling in Aurora from mozilla.debian.net]
[ed3: definitely some gui glitches, so I don't recommend trying Aurora with vimperator right now - but looks like the address bar shouldn't be a problem either way.]
[ed4: with vimperator nightlies, things seem to work as they should with iceweasel/firefox aurora]
I also use Firefox with Vimperator and I've tried Vimium on Chrome, but both are obviously tacked on.
Vimperator's pretty good, but you people really need to check out Pentadactyl.
A few days ago I switched back to Firefox and Pentadactyl wasn't available for FF36. So I'm back to Vimperator + Tree Style Tab + Toolbar Autohide. Its a terrific setup, can't recommend it enough.