Hmmmm, I've done some digging, and it turns out that it's stored as a chrome app, same that chrome remote desktop. So I guess that google has already done the job of developing/creating?
Google doesn't create any app outside its ecosystem. Best is to bookmark FBC.
Chrome has a (relatively new) feature where it has an entry in the drop-down menu that says "Install FreeBitco.in". When you do that it just creates a desktop shortcut for you that takes you straight to the site in Chrome made to look like it's an app.