Pentadactyl is VIM bindings for your Firefox Browser
This is cool and very well implemented, I like the concept and find myself leaning towards VIM moreso than emacs which if I remember correctly has a browser built in LOL... If you have trouble remembering commands or keyboard shortcuts, you can bring up this help page at any time by typing :help or
Pentadactyl is a free browser add-on for Firefox, designed to make browsing more efficient and especially more keyboard accessible. Largely inspired by the Vim text editor, the appearance and finger feel of Pentadactyl should be familiar to Vim users. Additional web-specific features, such as our ‘Hint’ mode, command interface, and key bindings to automatically follow back and forward links, make it easy to navigate without touching the mouse and give Pentadactyl a habit forming nature of its own.