Examine source code of Weatherlicious

{
  "manifest_version": 2,
  "name": "Weatherlicious",
  "version": "2.0",
  "description": "Theme the browser based on the weather.",
  "permissions": [
    "theme",
    "alarms",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "shared.js",
      "background/background.js"
    ]
  },
  "options_ui": {
    "page": "editor/editor.html",
    "browser_style": true
  }
}