Examine source code of Dolphins4

{
  "theme": {
    "images": {
      "theme_frame": "Dolphins4.jpg"
    },
    "colors": {
      "frame": "#0d0101",
      "tab_background_text": "#0d0101"
    }
  },
  "version": "2.0",
  "name": "Dolphins4",
  "manifest_version": 2,
  "description": "A fourth choice of Dolphins and ocean,  created with the ray-tracing program, \"Bryce\".\nSee more illustrations and animations from PeakPixels on YouTube."
}