<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <title>Test page for window.opener accessibility</title>
</head>
<body>
  <iframe id="child" name="child" src="https://example.org/browser/browser/components/originattributes/test/browser/file_firstPartyBasic.html"></iframe>
</body>
</html>
