Examine source code of Hello

{
  "manifest_version": 3,
  "name": "Hello",
  "description": "New tab page with widgets and fresh image every day.",
  "author": "Petr Huřťák",
  "version": "1.0.12",
  "icons": {
    "128": "assets/logo-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [],
  "offline_enabled": true,
  "browser_specific_settings": {
    "gecko": {
      "id": "{6c06aa5f-f56e-4bd6-bc8d-62d2c3e22457}"
    }
  }
}