The author mentioned using "Chromium with Vimium". For someone wanting easy keyboard shortcuts (like Vim) for a browser, I'd recommend luakit.

It's a webkit based browser, scriptable (or written with?) lua, along with vim style navigation (eg, ":open www.google.com" to go to google).

afaik, it's also available in the arch core (or extra possibly) repositorys, which means no fiddling about with the aur! (good news)