Examine source code of CSS game

{
  "theme": {
    "images": {
      "theme_frame": "bannercounterstrikesource.jpg"
    },
    "colors": {
      "frame": "#0811c4",
      "tab_background_text": "#5e5d5d"
    }
  },
  "version": "2.0",
  "name": "CSS game",
  "manifest_version": 2,
  "description": "Personal banner for a game"
}