Examine source code of Snowing Fall

{
  "theme": {
    "images": {
      "theme_frame": "snow_fallH.jpg"
    },
    "colors": {
      "frame": "#4c5761",
      "tab_background_text": "#ffb473"
    }
  },
  "version": "2.0",
  "name": "Snowing Fall",
  "manifest_version": 2,
  "description": "Simple snow."
}