docshell/test/browser/file_onbeforeunload_1.html


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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
</head>
<body>
  <iframe src="http://mochi.test:8888/browser/docshell/test/browser/file_onbeforeunload_2.html"></iframe>
</body>
</html>