LogGlobals From http://bgrins.github.io/devtools-snippets/#dataurl

logglobals.js

/*  log-globals  by Sindre Sorhus  https://github.com/sindresorhus/log-globals  MIT License */ 
(function () {  'use strict';   

function getIframe() {   
   var el = document.createElement('iframe');   
   el.style.display = 'none';   
   document.body.appendChild(el);   
   var win = el.contentWindow;   
   document.body.removeChild(el);   
   return win;  
  }
   
function detectGlobals() {   
    var iframe = getIframe();   
    var ret = Object.create(null);    
    for (var prop in window) {    
    if (!(prop in iframe)) {     
         ret[prop] = window[prop];    
         }   
    }    return ret;  
}   
    console.log(detectGlobals()); 

})();