Caffeine - Keep Awake

This extension prevents your operating system from entering hibernate or sleep mode by offering two levels of operation:

1. "Display" level: It prevents single or multiple monitors from dimming or displaying screensavers.

2. "System" level: It prevents the entire system from entering the power-saving state.

Key features of the extension include:

1. Operation on display or system level.

2. Ability to keep the system awake for a specified period (ranging from 5 minutes to 24 hours) and then allow it to sleep.