[
  {
    "namespace": "builtin.newtab",
    "description": "New Tab built-in addon internal API",
    "functions": [
      {
        "name": "handleUpdateAvailable",
        "type": "function",
        "description": "Runs routines specific to the built-in New Tab add-on when an update to the addon is downloaded",
        "parameters": [],
        "async": false
      }
    ]
  }
]