Also there is: Surfing Keys: https://github.com/brookhong/Surfingkeys https://github.com/brookhong/Surfingkeys Tridactyl: https://github.com/tridactyl/tridact

Also there is: Surfing Keys: https://github.com/brookhong/Surfingkeys https://github.com/brookhong/Surfingkeys Tridactyl: https://github.com/tridactyl/tridactyl https://github.com/tridactyl/tridactyl Both target Firefox, but may have Chrome versions as well.