Examine source code of Merlin Series 3

{
  "theme": {
    "images": {
      "theme_frame": "MerlinS3Banner.jpg"
    },
    "colors": {
      "frame": "#d9d9d9",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Merlin Series 3",
  "manifest_version": 2,
  "description": "BBC TV series 'Merlin'.  Promotional images from series 3.  (Disclaimer: Merlin is the property of the BBC and Shine Ltd.)"
}