Dùng navigator.plugins (mảng) để liệt kê plugin. Mỗi entry có name, filename, description.
Ví dụ
<html>
<head>
<title>List of Plug-Ins</title>
</head>
<body>
<table border="1">
<tr>
<th>Plug-in Name</th>
<th>Filename</th>
<th>Description</th>
</tr>
<script>
for (var i = 0; i < navigator.plugins.length; i++) {
document.write("<tr><td>" + navigator.plugins[i].name + "</td><td>");
document.write(navigator.plugins[i].filename + "</td><td>");
document.write(navigator.plugins[i].description + "</td></tr>");
}
</script>
</table>
</body>
</html>