Examine source code of YT Playlist better

{
  "version": "2.3.0",
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": "icon16.png",
    "default_title": "__MSG_appName__"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "src/main.js"
      ],
      "css": [
        "yt-playlist-better.css"
      ]
    }
  ],
  "host_permissions": [
    "https://www.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{89c72a98-e21d-4971-af1e-deb7f7f54bc4}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}