Examine source code of Jellybean Graphic

{
  "theme": {
    "images": {
      "theme_frame": "xHEADER_JB.png"
    },
    "colors": {
      "frame": "#00ff00",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Jellybean Graphic",
  "manifest_version": 2,
  "description": "This is the Jellybean Graphic Arts Group' new skin for Firefox Personas.\n\nWe can be found on Flickr - Search jellybeangfx\n\nThe skin is a simple graduated 'black rainbow' with our logo imposed on the backgrounds."
}