We have updated the port used by graphene.bitshares.org to use 443.
We have also added improved user error messages (better than grey screen)
Thanks it works now.
Consider gzipping the css/js files and using a CDN (cloudflare is free, but perhaps the added optimizations are worth it to pay for especially RailGun, they reduce the time to load the page considerably and colocate the content for you so less load on your nginx servers).
Anyways consider the static files to be served by CDN and your index can be sent from server (bypass the CDN) so you can preserve cookies.
Currently its 2.5M to load the site which takes 4.42s gzipped it would be a fraction of that. Cloudflare can gzip on the fly for you, although best to pre-gzip and store as your release build.
Check the score:
https://gtmetrix.com/reports/graphene.bitshares.org/6HVYreVyBased on that you should:
1) Enable Gzip
2) Leverage browser caching (set a long time to expire these files to leverage local cache)
3) use a CDN for colocated loading.