This is a script written for the admittedly small userbase use case of navigating using the keyboard on Sufficient Velocity. As requested of the admins and denied here: https://forums.sufficientvelocity.com/threads/keyboard-shortcut-for-next-page.65588/

Controls:
CTRL/CMD + Left Arrow: Back (if back is possible)
CTRL/CMD + Right Arrow: Next (if next is possible)