Examine source code of root-new-tab

{
  "manifest_version": 3,
  "name": "root - New Tab",
  "version": "1.0.0",
  "description": "root: The Ultimate Startup Page",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "root-extension@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "data_collection": false,
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_icon": {
      "16": "android-chrome-192x192.png",
      "48": "android-chrome-192x192.png",
      "128": "android-chrome-192x192.png"
    }
  },
  "icons": {
    "16": "android-chrome-192x192.png",
    "48": "android-chrome-192x192.png",
    "128": "android-chrome-192x192.png"
  }
}