Examine source code of Lightning&Moon

{
  "theme": {
    "images": {
      "theme_frame": "lightning2b.jpg"
    },
    "colors": {
      "frame": "#030840",
      "tab_background_text": "#f1fc8d"
    }
  },
  "version": "2.0",
  "name": "Lightning&Moon",
  "manifest_version": 2,
  "description": "Lightning time lapse and moon rise over eastern Montana."
}