Nothing found in the forum. I apologize if I repeat the post.
If you have to send HTTP requests (GET / POST) during development (to send highscores for example) you will see that you can not, because the browser detects that localhost and the domain to which you send or request information (mydomain.com) are different domains.
In order to make cross-domain requests installs Firefox and the extension Force CORS 1.3. Press Ctrl+/ to view the extensions toolbar and you'll see the text cors, if you click will turn red and capitalization: from that moment you may do requests POST / GET from localhost to your server and save a lot of time.
Note 1: Use the extension at your own risk. Do not surf the internet with CORS enabled.
Note 2: Sorry for my English.