It didn't load for me in Firefox. When it didn't load in Chrome either, I noticed that the script was being loaded from an unsafe source, which both Firefox 46 and Chrome seem to block by default.
I like that this post has now become a post where people trying to debug the whole damn link to have more difficulty reading a webpage with letters jumbling around :P.
The Disqus.com comments are still blocked on the secure version of the page (disqus.com/embed.js is loaded via HTTP only), but the main functionality works fine now with HTTPS Everywhere enabled.
Doesn't work for me on either Firefox or Chrome desktop.