hjkl065 автор WIN55 - TRANG CHỦ CHÍNH THỨC MỚI NHẤT

You can navigate left, down, up, and right using the "hjkl" keys respectively. I find that most other Vim extensions modify too many existing keyboard shortcuts, which doesn’t suit my taste. This is an incredibly minimal extension that I developed for my own productivity. Please note that this extension may not work on every webpage.

See the full source code at https://github.com/jomccr/firefox-hjkl/.