Examine source code of Snow Fall

{
  "theme": {
    "images": {
      "theme_frame": "snow_falling.jpg"
    },
    "colors": {
      "frame": "#020e4f",
      "tab_background_text": "#1d73b5"
    }
  },
  "version": "2.0",
  "name": "Snow Fall",
  "manifest_version": 2,
  "description": "Snow Fall in the woods"
}