iplayif.com hosts a javascript implementation of an interactive fiction interpreter. You provide if with a URL of a "z-code" file, it fetches and interprets it. With HTTPS-Everywhere enabled, the jQuery XHR call that fetches the file fails. Perhaps HTTPS-Everywhere tries to fetch the file using HTTPS? Example URL: http://iplayif.com/?story=http://mirror.ifarchive.org/if-archive/games/zcode/LostPig.z8 If all goes well, you should see black-on-white text. At the moment, it shows a white-on-red error screen. I'm using the latest Firefox Nightly, and HTTPS-Everywhere 4.0development.6 **Trac**: **Username**: salty-horse