[SteveDeFacto]

Unrelated but I have used Vimium too. In my opinion Pentadactyl for Firefox is far better than Vimium. Firefox can also be as fast or faster than chrome if you enable pipeling. Then there are also countless other plugins for Firefox that can improve productivity.

[dizzystar]

I'll definitely try that out. I use FF at home but I'm basically forced to use Chrome at work. I have a few javascript scripts I run through the browser URL, and as far as I can tell, this doesn't work with FF.

[SteveDeFacto]

I think either greasemonkey or firebug extensions would do what you are looking for. Remember, firefox is all about extendability. They want to only provide you with the minimal features which most users need and let you choose what features you want to add.