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<head>
<script type="text/javascript">
window.onload = function() {
const bc = SpecialPowers.wrap(BroadcastChannel)
.unpartitionedTestingChannel("sessionStorageTargetBlank");
bc.postMessage({
key1: sessionStorage.getItem("key1"),
length: sessionStorage.length,
hasOpener: !!window.opener,
});
bc.close();
parent.close();
};
</script>
</head>
<body>
</body>
</html>