Examine source code of AdCut

{
  "manifest_version": 3,
  "name": "AdCut",
  "version": "1.5",
  "description": "Fast-forward YouTube ads automatically. Now free and community-supported!",
  "developer": {
    "name": "Rakesh V"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "adcut-pro@yourdomain.com",
      "strict_min_version": "140.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.youtube.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ]
}