Examine source code of YouTube Video Zoom

{
  "manifest_version": 2,
  "name": "YouTube Video Zoom",
  "version": "1.0",
  "description": "Zoom in on YouTube videos using the mouse scroll wheel.",
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{c7f584aa-0ecf-4584-bae4-6f7082711203}"
    }
  }
}