Override window.location

gistfile1.js

(function () {

  var _window = window;
  
  (function () {
    var window = {};
    
    Object.defineProperty(window, 'location', {
      get: function () { return _window.location; },
      set: function () { alert('not in my house'); }
    });
    window.__proto__ = _window;
    
    // At this point, 'window' is identical to normal window except 
    // we've overriden its location property to be read-only.
    
    // If you could manage to run your page's environment here, you could 
    // intercept attempts to change the page.
    
    window.location = "blah"; // alerts 'not in my house'
  }());

}());

@ohpyupi @puppeteer701vungle This snippet is from six years ago and new security rules in browsers prevent this approach from working now.