Using the HTML downloader only works locally so you need to download it:
Download the files: (right click and Save link as) Download 1 (download.html) download.html Download 2 (condensed_python.js) condensed_python.js Download 3 (download_link.js) download_link.jsPut the three files in a folder and open download.html in your browser.
To try it out right away you can download a Tenfingers test link: Download test link (page1.10f) page1.10f