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.
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Once you have Vimium installed, you can see this list of key bindings at any time by typing ?.
Source: https://addons.mozilla.org/en-GB/firefox/addon/vimium-ff/