Nothing too serious, just go to cookie clicker, open the console (F12 or Ctrl + Shift + J)
And copy/past this code :
var script = document.createElement('script');
script.id = "CheatSheetScript";
document.getElementsByTagName('head')[0].appendChild(script);
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById('CheatSheetScript').innerHTML = this.responseText;
} else if (this.readyState == 4) Game.Prompt("Error loading Cheat Sheet, please check your internet connection", ["Ok"]);
};
xhttp.open("GET", "https://raw.githubusercontent.com/STMiki/cookieClickerCheatSheet/master/src/main.js", true);
xhttp.send();
You will see something like this pop in your Store :
Enjoy !