Examine source code of Dancing dolphins

{
  "theme": {
    "images": {
      "theme_frame": "dolphins.jpg"
    },
    "colors": {
      "frame": "#c9c3c3",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Dancing dolphins",
  "manifest_version": 2,
  "description": "... frolic across and through the waves"
}