Examine source code of YouTube Tag Viewer

{
  "manifest_version": 3,
  "name": "YouTube Tag Viewer",
  "version": "1.2.1",
  "description": "Displays YouTube video tags beneath the description.",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png",
    "256": "icon-256.png",
    "512": "icon-512.png"
  },
  "author": "NRFH",
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage"
  ],
  "action": {
    "default_title": "YouTube Tag Viewer",
    "default_popup": "popup.html"
  },
  "host_permissions": [
    "https://www.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-tag-viewer@nrfh",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}