Examine source code of Blue Blue Fox

{
  "theme": {
    "images": {
      "theme_frame": "BluePattern_head.jpg"
    },
    "colors": {
      "frame": "#11185c",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue Blue Fox",
  "manifest_version": 2,
  "description": "Did I say blue yet? Three blue roads meander across each other and a background of blue spheres while a blue Firefox naps in the corner."
}