chromium/chrome/test/data/extensions/options_page/manifest.json

{
  "name": "Extension With Options Page",
  "description": "An extension with an options page and an extra page",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "version": "0.1.1",
  "manifest_version": 3
}