Examine source code of Dolphins3

{
  "theme": {
    "images": {
      "theme_frame": "Dolphins3.jpg"
    },
    "colors": {
      "frame": "#0a0a0a",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Dolphins3",
  "manifest_version": 2,
  "description": "A third choice of Dolphins and ocean.\nSee more illustrations and animations from PeakPixels on YouTube."
}