Allows you to use arrow keys to navigate the site
Allows you to use arrow keys to go to the next/prev page. (Note: only on pages like https://manganelo.com/genre-all/2, for chapter select with arrows see: https://greasyfork.org/en/scripts/395029-manganelo-shortcuts and https://greasyfork.org/en/scripts/395032-mangakakalot-shortcuts)