file_about_parent.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test for Bug 1329032</title>

</head>

<body>

  <a href="about:test-about-principal-child" id="aboutchildprincipal">about:test-about-principal-child</a>

</body>

</html>