Lifehacker's Adam Pash made a nice post last year about using Firefox without a mouse. Firefox has a lot of handy keyboard shortcuts, but in the end it's hard to be as efficient without a mouse as with. Regular readers know where I'm headed with this: An extension to remedy that. Mouseless Browsing is an extension for Firefox that aims, in the words of its developers, to "enable browsing only by using the numpad keys." It does this by displaying uniqued ID numbers next to important elements--links, form fields, and so on--that you can punch in on the numeric keypad. This reminds me of browsing in text-mode from the console.