Examine source code of YouTube Ad Skipping

{
  "manifest_version": 2,
  "name": "YouTube Ad Skipping",
  "version": "1.1",
  "description": "An extension that allows skipping YouTube ads.",
  "icons": {
    "48": "icons/skip-add-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "skip-add.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{22ee05ae-526d-463f-853c-5091121c17b2}"
    }
  }
}