title: NetworkError: Failed to execute 'send' on 'XMLHttpRequest' with Chrome Browser - Ext JS
body: <p>I am getting an error on logging out from an application via Chrome browser only.</p>
  <p>Chrome browser version 86.0</p>
  <blockquote>
  <p>Blocked alert('Uncaught NetworkError: Failed to execute 'send' on
  'XMLHttpRequest': Failed to load
  'https://host-name/web/base/logout?id=40dee37f-cf1d-40f9-b01d-2a414d446a77&amp;tenant=ABC&amp;isFrameMode=true&amp;_dc=1602665141328':
  Synchronous XHR in page dismissal. See
  <a href="https://www.chromestatus.com/feature/4664843055398912" rel="nofollow noreferrer">https://www.chromestatus.com/feature/4664843055398912</a> for more
  details.. line: 1. url:
  https://hostname/web/base/abc/app.js?_dc=20161213063112') during
  unload.</p>
  </blockquote>
  <p>Code that is being used to logout from Application :</p>
  <pre><code>var vRequest = { url: vUrl, async: false },
  Ext.Ajax.request(vRequest);
  </code></pre>
  <p>Have tried changing the async attribute value from false to true but now the request status is being displayed as canceled in Developer Tools.</p>