Override system power-saving settings.
This extension makes it easy to temporarily disable power management on Chrome OS.
It adds an icon in the upper-right corner of the browser that can be clicked to switch between modes where the screen is kept on (sun icon), the system is prevented from sleeping (sunset), or power-saving settings are left unchanged (moon).
* Will this extension prevent a Chromebook from suspending when its lid is closed?
No, but if an external display is connected, recent versions of Chrome OS will remain awake when the lid is closed.
* What's the difference between the "screen is kept on" and "system is prevented from sleeping" modes?
When the system is prevented from sleeping (sunset icon), network connections will remain active; this may be useful if using e.g. the Secure Shell app. The screen will still dim and turn off eventually, though. In the "screen is kept on" mode (sun icon), the system will avoid sleeping and the display will additionally remain on.
* What do the icons mean?
The sun icon means that the screen will be kept on. The moon icon means that the system will behave the same way that it would if the extension were not installed. The sunset icon is a middle ground: the system will avoid sleeping (as described above) but the screen will still turn off.