tamper monkey script to register as a uk student with any email

samsung-uk-student.user.js

// ==UserScript==
// @name         smsng-uk-student-any-mail
// @namespace    http://tampermonkey.net/
// @version      0.1
// @match        https://shop.samsung.com/uk/multistore/ukepp/uk_student/registration
// @icon         https://www.google.com/s2/favicons?sz=64&domain=samsung.com
// @grant        GM_addStyle
// @run-at       document-start
// ==/UserScript==

var _open = XMLHttpRequest.prototype.open;

window.XMLHttpRequest.prototype.open = function(method, URL) {
  var _onreadystatechange = this.onreadystatechange,
    _this = this;

  _this.onreadystatechange = function() {
    if (
      _this.readyState === 4 &&
      _this.status === 200 &&
      ~URL.indexOf("registration?email=")
    ) {
      try {
        var data = _this.response;
        data = true;
        Object.defineProperty(_this, "response", {
          value: data
        });
      } catch (e) {
        console.log("Error", method, URL, e);
      }

      console.log("Caught", method, URL, _this.response);
    }

    if (_onreadystatechange) _onreadystatechange.apply(this, arguments);
  };

  Object.defineProperty(this, "onreadystatechange", {
    get: function get() {
      return _onreadystatechange;
    },
    set: function set(value) {
      _onreadystatechange = value;
    }
  });
  return _open.apply(_this, arguments);
};