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Test Info:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>demo 1</title>
</head><body>
These unusual characters, &#1048713;,
cause Firefox to crash &#x100089;
</body></html>