Examine source code of Sloth

{
  "name": "Sloth",
  "author": "FrootyStudios",
  "version": "1.2",
  "description": "Hey Lazy! I am a convenient tool to control your Music.",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.gaana.com/*",
        "*://*.spotify.com/*"
      ],
      "css": [],
      "js": [
        "libs/jquery.slim.js",
        "config/selectorConfig.js",
        "config/extensionCommandsConfig.js",
        "contentScript/gaanaController.js",
        "contentScript/spotifyController.js",
        "contentScript/youTubeController.js",
        "contentScript/musicYouTubeController.js",
        "contentScript/index.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "views/popup.html",
    "default_icon": {
      "16": "assets/icons/ext_icon_16.png",
      "32": "assets/icons/ext_icon_32.png",
      "48": "assets/icons/ext_icon_48.png",
      "128": "assets/icons/ext_icon_128.png"
    }
  },
  "icons": {
    "16": "assets/icons/ext_icon_16.png",
    "32": "assets/icons/ext_icon_32.png",
    "48": "assets/icons/ext_icon_48.png",
    "128": "assets/icons/ext_icon_128.png"
  }
}