Examine source code of Spotify Shuffler

{
  "manifest_version": 2,
  "name": "Spotify Shuffler",
  "version": "1.0",
  "description": "Sick of Spotify's boring shuffle? Shake up your playlists with our permanent shuffle and keep the tunes fresh every time!",
  "permissions": [
    "identity",
    "storage"
  ],
  "host_permissions": [
    "https://api.spotify.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shettyroshanp@gmail.com"
    }
  }
}