Examine source code of LoopMaster - YouTube A-B Looper

{
  "manifest_version": 3,
  "name": "LoopMaster - YouTube A-B Looper",
  "version": "2.0.2",
  "description": "Loop specific parts of YouTube videos with one click",
  "browser_specific_settings": {
    "gecko": {
      "id": "loopmaster@your-email.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.youtube.com/*",
    "https://m.youtube.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "dist/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "128": "icons/icon128.png"
  }
}