Examine source code of YouTube Ad Auto-skipper

{
  "name": "YouTube Ad Auto-skipper",
  "short_name": "YouTube Ad Skipper",
  "description": "Automatisches überspringen der youtube werbung",
  "manifest_version": 2,
  "version": "2021.2",
  "homepage_url": "https://wuemeli.com",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "skipad.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "icons": {
    "128": "logo.png"
  }
}