Greasemonkey issue #2235: GM_xmlhttpRequest overwrite cookie in headers parameter

greasemonkey_issue_2235.user.js

// ==UserScript==
// @name        Greasemonkey - issue - 2235
// @include     http://www.html-kit.com/tools/cookietester/
// @noframes
// @grant       GM_log
// @grant       GM_xmlhttpRequest
// ==/UserScript==

var anonymous = false;
if (confirm("Anonymous?")) {
  anonymous = true;
}

GM_xmlhttpRequest({
  "url": "http://www.html-kit.com/tools/cookietester/",
  "method": "GET",
  // "mozAnon": anonymous,
  "anonymous": anonymous,
  "headers": {
    "cookie": "name1=value1; name2=value2;" // + " " + document.cookie // cookies not HttpOnly
  },
  "onload": function (response) {
    alert(response.responseText);
  }
});