[
  {
    "namespace": "experiments.prefmanager",
    "description": "Experimental API for updating Geckoview preferences",
    "functions": [
      {
        "name": "getPrefList",
        "type": "function",
        "description": "Retrieves list of all preferences",
        "async": true,
        "parameters": [],
        "returns": {
          "array": "object",
          "description": "Object containing the preferences as key-value pairs",
          "items": {
            "type": "string"
          }
        }
      }
    ]
  }
]