Slightly embarrassing -- but the problem may be that the site isn't compatible with FireFox (at least pre-v63 FireFox). The site makes use of custom HTML elements which are not supported by default in pre-v63 FireFox (https://developer.mozilla.org/en-US/docs/Web/Web_Components/...). The good news is that all you need to do is to turn on a flag as set forth in the link provided. The bad news is that many other less tech-savvy people are going to be stymied by this.

edit: the site will now warn you if your browser is incompatible.

It's 2018 and we're back in 1998 where website proudly showed "Optimized for Internet Explorer".

In 1998 sites might looks bad but at least user can still read the content. In 2018, some sites just refuses to work for anything but Google Chrome.

In 1998 you had to be running Windows. Now you can run any OS, even if the browser you have to use for a certain site isn't your favorite. It's an improvement.

People have always wanted to use "the web" as an application platform. It didn't work that well in 1998, but it's pretty good now. Progress has been made.

The difference is these are standard features, albeit ones that are just coming out.

Also not working on Edge.

I was confused too. It appears the page does not work on Firefox. I get a "customElements is not defined" error in the console in Firefox and none of the interactive sections render.

The page works fine on Chrome.

Doesn't work on Chrome for me - Version 67.0.3

Yeah I wondered if it was something like that.