It seems neat on the surface but it also seem to involve two redirects, first one to google.com (which is not obvious and personally not something I would like), and then to MDN. It would be cool if it linked directly to the page on MDN or showed the content directly within the page.

And the second time I clicked I was met with this message, not mdn.io's fault but nonetheless (i.e. "google police" - not sure what they mean with "unusual activity", there is hardly any at the moment - maybe not enough? :) or maybe I just got a busy vpn exit point): https://imgur.com/itn48dZ