Design for performance examples are broken

[mgaudet]

Visiting the Design for Performance site here, there's a sequence of messages in the console indicating load failures:

Load denied by X-Frame-Options: https://design.firefox.com/photon/interactives/introduction/performance-principles/responsiveness/example-dont.html does not permit framing.

and the examples don't load.

(Tried Nightly and Safari)

[aminalhazwani]

They work now 🙂