// Add this:
var _wr = function(type) {
  var orig = history[type];
  return function() {
    var rv = orig.apply(this, arguments);
    var e = new Event(type);
    e.arguments = arguments;
    window.dispatchEvent(e);
    return rv;
  };
};
history.pushState = _wr('pushState');
history.replaceState = _wr('replaceState');

// Use it like this:
window.addEventListener('pushState', function(e) {
  console.warn('THEY DID IT AGAIN!');
});
window.addEventListener('replaceState', function(e) {
  console.warn('THEY DID IT AGAIN!');
});