Vorlon.js is a debugging tool for webpages. It's sort of like the F12 tools built into your favorite browser, but it has one big advantage - it works remotely.
With Vorlon.js, you put a single script reference on your web page and then install the vorlon npm package on your local machine (or in the cloud) and you're ready to go.
If you're curious now, just watch Etienne - one of Vorlon's authors - explain it in this episode of CodeChat.
Please feel free to ask questions in the comment thread below.