Bonell - Candybox Autosaver

My friend @matheusbonela lost his progress when playing Candy Box, an awesome text based game you can check out here: http://candies.aniwey.net/

So I made this little extension that enables and autosave feature on the page. It sill save your game each 15 seconds, so you don't need to worry about losing much of your progress in case of misclosing a tab or browser crashes.