Examine source code of New Tab Ultra

{
  "manifest_version": 3,
  "name": "NT Ultra",
  "description": "The final boss of New Tab Pages",
  "version": "0.9",
  "icons": {
    "128": "static/logo128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "permissions": [
    "tabs",
    "tabGroups",
    "contextMenus",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "js/core/background.js"
    ]
  },
  "minimum_chrome_version": "114",
  "browser_specific_settings": {
    "gecko": {
      "id": "ntultra@soulhotel.net",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}