Ask HN: Programmatic access to browser plug-in stats?

I have a browser extension on the Chrome and Firefox stores. I know I can check for new downloads and active users via the UI, but I’d love to access that same data programmatically. Before I hack away on something to pull it from the UI, does anyone know of an existing way to access daily downloads/weekly users/etc. programmatically (like an existing API from Google/Mozilla that I can’t seem to find)? Thanks in advance!