I just took a gander: no tab-search, the keybindings are closer to Vimium than plain vim and no external editor. Also the hinting is _slow_ - it takes a second to render the link hints on the hacker news home page.
I have been testing out VimFx as well (long time Pentadactyl user). I miss being able to do ":b" and quickly find open tabs, but the Firefox awesomebar has a similar functionality if you type "%". That's what I have been using. You can see more information here: https://support.mozilla.org/en-US/kb/awesome-bar-search-fire...
How are you dealing with all of that?