Examine source code of Brotab Bookmarks Manager

{
  "manifest_version": 3,
  "name": "Brotab",
  "version": "1.2.1",
  "description": "Transform your new tab into a powerful bookmark management system",
  "permissions": [
    "menus",
    "bookmarks",
    "storage",
    "tabs"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; connect-src 'self' https://brotab.com; object-src 'self';"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "brotab@brotab.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "bookmarksInfo"
        ],
        "optional": []
      }
    }
  }
}