Examine source code of Ad Video Skipper

{
  "manifest_version": 2,
  "name": "AdVideo Skipper",
  "version": "1.0.1",
  "description": "Skips detected YouTube ad videos by skipping close to their end.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b868278-afe8-435e-a5dc-a36ca886ec6d}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}