chromium/chrome/test/data/extensions/api_test/permissions/optional_request_from_popup/manifest.json

{
  "name": "Request permissions from extension popup",
  "version": "0.1",
  "manifest_version": 3,
  "description": "Requests optional permissions from an extension action popup.",
  "action": {
    "default_popup": "popup.html"
  },
  "optional_host_permissions": [
      "https://www.google.com/"
  ]
}