Examine source code of Osilion Browser Game

{
  "theme": {
    "images": {
      "theme_frame": "osilion3000x200LH.jpg"
    },
    "colors": {
      "frame": "#ed7437",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Osilion Browser Game",
  "manifest_version": 2,
  "description": "medioeval browser game\n<a href=\"https://outgoing.prod.mozaws.net/v1/c91edb8e097a1441f9cdbe04ddbc153735f1649c339c9a7843852e7de3c59452/http%3A//www.osilion.com/\" rel=\"nofollow\">http://www.osilion.com/</a>"
}