Download Vimium-FF for Firefox. The Hacker's Browser. Vimium provides keyboard shortcuts for navigation and control in the spirit of Vim. This is a port of the popular Chrome extension to Firefox. Most stuff works, but the port to Firefox remains a work in progress.
Very useful and pleasant to use. You almost don’t have to move your fingers out of the keyboard with this extension.
Thanks, I removed Vimium and use Tridactyl now. It has a better interface, and an easier way to use the visual mode (for text selection).