Keep on

Keep display or system awake for a given duration. It overrides temporarily the system power-saving settings. Simple chrome…

Keep display or system awake for a given duration. 
It overrides temporarily the system power-saving settings.

Simple chrome packaged app allowing the user to prevent screen to turn off or system from going to sleep. 
It allows overriding system power-saving settings for a given duration (from 10 min to infinite).
When the app is closed, system power-saving settings are restored.