Examine source code of Undoo Startpage

{
  "name": "Undoo Startpage",
  "short_name": "Undoo",
  "manifest_version": 3,
  "version": "14.0.0",
  "permissions": [
    "storage",
    "bookmarks",
    "topSites"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "krishna404@yandex.com"
    }
  },
  "icons": {
    "16": "/undoo.svg"
  }
}