Examine source code of Moving Sky

{
  "theme": {
    "images": {
      "theme_frame": "moving_sky_header.jpg"
    },
    "colors": {
      "frame": "#aaaaaa",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Moving Sky",
  "manifest_version": 2,
  "description": "The setting sun in Hawaii. Smooth enough to give you some laidback feeling during your netsurfing."
}