Examine source code of YouTube Cleaner

{
  "manifest_version": 3,
  "name": "YouTube Cleaner",
  "description": "Hide distractions on YouTube like comments, sidebars, and homepage clutter.",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "cleaner.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ytcleaner@yourdomain.com",
      "strict_min_version": "109.0"
    }
  }
}