Examine source code of Argh - Youtube Blocker

{
  "manifest_version": 2,
  "name": "Argh - Youtube Blocker",
  "version": "0.2",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "index.js"
      ],
      "css": [
        "resources/css/style.css"
      ]
    }
  ],
  "icons": {
    "64": "icon.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "resources/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "argh@jhuwald.com"
    }
  }
}