Website on mobile and screen sleep

It would be nice if the website would have a setting where users could enable "prevent screen sleep" when browsing on mobile devices.

I often find myself having to nudge the screen while doing puzzles/watching broadcasts/thinking to keep my phone screen from sleeping/locking.

I changed my phone's option to 10 minutes of inactivity before shutting off screen... That way when I'm doing a puzzle and the screen shuts off I know I'm a patzer