I'm not sure what features of Vimperator you're using, but if it's only about being able to navigate through your keyboard only, try Vimium-FF: https://addons.mozilla.org/en-US/firefox/addon/vimium-ff/?sr...
For instance, doesn't work on non-website pages, often have to cmd-w when x doesn't work completely defeating the extension to begin with. No d vs D to close prev/next tab, or p vs P. No temporary pass-thru, just whitelists.
Anyone who thinks Vimium is anywhere nearly as polished as Vimperator probably never used the latter much. Though not sure if it's to do with API limits vs general lack of polish.
But since Chrome never had a single solution as good as Pentadactyl/Vimperator, must be an API thing which means we're a bit screwed.
That's why I suggested it - apparently OP didn't use it that extensively :)
Note that even if Chrome didn't have an API, that doesn't mean Firefox will never get it. For example, Vimium had to reimplement its own address bar, but I believe they're working on API's that will let it manipulate Firefox's.
Also the ability to redefine keys since I use colemak.
I was briefly trying chrome and cVim did seem promising but I prefer firefox.
Edit: I had to try it immediately and it looks very promising, thanks. Covers all the basic stuff I need.
Depending on what you mean by this, be sure to check the advanced settings for vimium-ff. It will let you choose which characters to use for the hints, or there's a buried option to use the link text instead.