Get the extensions installed in Chrome

I want to get the extensions installed in Chrome using JavaScript .

I found this code, but it only shows the plugins installed:

var L = navigator.plugins.length;
document.write(L.toString().bold() + " Plugin(s)".bold());
document.write("<br>");
document.write("Name | Filename | description".bold());
document.write("<br>");
for(var i=0; i<L; i++) {
    document.write(navigator.plugins[i].name);
    document.write(" | ");
    document.write(navigator.plugins[i].filename);
    document.write(" | ");
    document.write(navigator.plugins[i].description);
    document.write(" | ");
    document.write(navigator.plugins[i].version);
    document.write("<br>");
}