Examine source code of Clean Youtube links

{
  "manifest_version": 2,
  "name": "Clean Youtube links",
  "version": "1.0",
  "description": "Replaces the Youtube redirect tracking link with the actual link",
  "icons": {
    "48": "icons/image-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d36bb1a2-ae24-4d84-8da3-e9327f1b2a1b}"
    }
  }
}