Hi there,
seems you have not noticed yet, that the web pages styles are broken in some browsers.
You redirect to https and chrome started it and now firefox also does not allow cross https/http loading, so when running a page in https, all stylesheets and javascripts must also be https or firefox/chrome won't load it.
You need to change links like this:
<link rel="stylesheet" type="text/css" href="http://sfml-dev.org/styles/style.css" title="default" media="screen,print"/>
to this (double slash = protocol relative):
<link rel="stylesheet" type="text/css" href="//sfml-dev.org/styles/style.css" title="default" media="screen,print"/>
Here are all problematic files from firefox console:
[08:35:20.568] Blocked loading mixed active content "http://fonts.googleapis.com/css?family=Ubuntu:400,700,400italic" @ https://sfml-dev.org/
[08:35:20.571] Blocked loading mixed active content "http://sfml-dev.org/styles/style.css" @ https://sfml-dev.org/
[08:35:20.571] Blocked loading mixed active content "http://sfml-dev.org/scripts/highlight/styles/github.css" @ https://sfml-dev.org/
[08:35:20.571] Blocked loading mixed active content "http://sfml-dev.org/scripts/highlight/highlight.pack.js" @ https://sfml-dev.org/
[08:35:20.642] Blocked loading mixed active content "http://www.google-analytics.com/urchin.js" @ https://sfml-dev.org/