Find all globals not native to the window object.

globals.js

(function f() {
  var frm = document.createElement("iframe");
  frm.style.display = "none";
  document.body.appendChild(frm);
  var a = Object.getOwnPropertyNames(frm.contentWindow);
  var b = Object.getOwnPropertyNames(window);
  var tab = {};
  b.filter(function(c) {
    return a.indexOf(c) === -1;
  }).map(function(i) {
    if (typeof window[i] !== 'undefined') {
      tab[i] = Array.isArray(window[i]) ? 'array' : typeof window[i];
    }
  });
  document.body.removeChild(frm);
  console.group("Globals Data"); 
  console.table(tab);
  console.groupEnd("Globals Data");
})();