{
  "name": "CSP Sandbox Baseline (no smuggle)",
  "version": "1.0",
  "manifest_version": 3,
  "description": "Baseline: properly sandboxed, expects opaque origin.",
  "sandbox": {
    "pages": ["sandboxed.html"]
  },
  "content_security_policy": {
    "sandbox": "sandbox allow-scripts"
  },
  "background": {
    "service_worker": "background.js"
  }
}