VimFx too - It's basically a clone of Vimium for Firefox, meaning it alters Firefox far less than Vimperator/Pentadactyl. There was previously a Firefox add-on that shared the name Vimium, but it doesn't seem to be maintained anymore.
If you're looking for just some great keybindings, and the ability to choose links on a page with your keyboard, I suggest checking out Vimium for Chrome. It changed my life.
Please note that gp is correct in that "if you're only looking for..." -- in my opinion it doesn't hold a candle to vimperator. Partly because of extension interaction differs between firefox and chrome, and partly... well the "flavour" just feels different.
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.
Any particular reason/extensions that makes you prefer Chrome/chromium?
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]
> Any particular reason/extensions that makes you prefer Chrome/chromium?
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.
As someone else has said, the ombibar is one of the main things. But what originally attracted me to it is the slim profile. (As an example of how much I care about this, I run windows in 'classic' theme mode, because it's the slimmest.) Firefox has a bigger header and has two search bars and I have to disable the menus to slim it down but then if I want access to them I have to re-enable them which is a pain.
[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'm working on a new JS framework that using a heavily modified Vim to allow you to write programs using only punch cards. But for it to work you have to be wearing a t-shirt that's one size too small and a scarf. It's not even done yet I'm already working a re-write in GO and Rust.
Tacked on, yes, but I'm not clear on what vimb does that Vimperator doesn't do, or couldn't do, in Firefox. The integration of Vimperator is pretty damn good.
I was using Pentadactyl about a year ago but I don't remember why it was better than Vimperator.
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.
Pentadactyl's ("5digits"?) build system is broken, and they haven't released a stable version recently. I publish my own personal builds from the unmodified source at this location[0], if you're interested.
Any highlights on how the two differ today? I seem to recall briefly using pentadactyl as vimperator broke something, perhaps "it's all text!". I don't understand how people can stand vimium - but that's probably because I've grown used to vimperator more than anything else.
I've never used Vimperator. I do know that Pentadactyl is far, far better than any solution I've ever used on Chrome because of how well integrated Firefox extensions can be and how limited Chrome extensions are (can't run on Chrome Store pages, can't run on builtin pages, can't run on file URLs, can't launch external programs, etc).
It's just their build system that's broken -- the code itself is fine; and works with the latest Fx. I'm using Firefox 36.0.1 right now with the builds I publish. The source is pulled and the extensions built every single night at midnight CST. Builds are located here[0].
surf: http://surf.suckless.org
jumanji: https://pwmt.org/projects/jumanji
luakit: https://mason-larobina.github.io/luakit
vimium: http://vimium.github.io
cVim (active): https://github.com/1995eaton/chromium-vim
pentadactyl (vimperator fork): http://5digits.org/pentadactyl