Examine source code of mountain river

{
  "theme": {
    "images": {
      "theme_frame": "mountainriveralto.jpg"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#66ff99"
    }
  },
  "version": "2.0",
  "name": "mountain river",
  "manifest_version": 2,
  "description": "stream,flowing water,water,nature,rock,\nwater surface,stone,landscape,idyllic,\nmountain range"
}