Examine source code of Gear Game

{
  "theme": {
    "images": {
      "theme_frame": "FireFoxGear12500200new.png"
    },
    "colors": {
      "frame": "#0d4dba",
      "tab_background_text": "#f2cb1b"
    }
  },
  "version": "2.0",
  "name": "Gear Game",
  "manifest_version": 2,
  "description": "Well there isn't much to say about the persona."
}