spotifydumper.html

<script src="jszip.min.js"></script>
<script src="FileSaver.min.js"></script>

<script src="https://raw.githubusercontent.com/Stuk/jszip/master/dist/jszip.min.js"></script>
<script src="https://raw.githubusercontent.com/eligrey/FileSaver.js/master/FileSaver.min.js"></script>

(function (main, modules) {
    'use strict';
    var zip = new JSZip();
    for (var property in modules) {
        if (modules.hasOwnProperty(property)) {
            zip.file(property, modules[property].toString());
        }
    }
    var content = zip.generate({type : "blob"});
    saveAs(content, "dump.zip");
}

<script>
// Concatenated script to dump goes here
</script>