Examine source code of Okage shadow king

{
  "theme": {
    "images": {
      "theme_frame": "firefoxokagetop.jpg"
    },
    "colors": {
      "frame": "#c45a5a",
      "tab_background_text": "#c71212"
    }
  },
  "version": "2.0",
  "name": "Okage shadow king",
  "manifest_version": 2,
  "description": "okage shadow king, evil king stan, awesome of course."
}