Surfing keys

Surfingkeys is another web browser extension (including Google Chrome, Chromium-based browsers, Firefox, Safari) that provides navigation and management of web pages using the keyboard in the spirit of the VIM editor. 

It's similar to Vimium, but adds even more keyboard shortcuts and control functions.

Surfingkeys is created with all the settings described in jаvascript, so anyone can easily map any keystrokes to their own specific jаvascript function.