Examine source code of AutoPlay YouTube

{
  "manifest_version": 2,
  "name": "AutoPlay YouTube",
  "version": "1.0",
  "description": "Reproduce automáticamente videos de YouTube cuando se pausan en los primeros 5 segundos.",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6201e7ee-020a-4725-a558-8d936bfbd2af}"
    }
  }
}