This is an extension that I started to make some years ago when I worked for a company. They had some kiosk computers that they let costumers surf at and they wanted an extension that reset the browser if it wasn't used for some time.

So that is what this extension does. If you don't move the mouse for a defined time the browser is restarted alternativ just closed. If you go into Tools -> Extensions and click option you can choose how long time the extension should wait before reseting the browser and also if you want it to restart the browser of just close it. Some kiosk OS restart the browser on its own if you just close it so I added that as an option.