Examine source code of Better YouTube Layout

{
  "manifest_version": 3,
  "name": "Better YouTube Layout",
  "version": "1.0",
  "description": "Clean subscriptions layout with side-by-side feed and shorts panel",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "src/content/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "better-youtube-layout@mail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "public/icon16.png",
    "48": "public/icon48.png",
    "128": "public/icon128.png"
  }
}