[
  {
    "namespace": "aboutConfigPrefs",
    "description": "experimental API extension to allow access to about:config preferences",
    "events": [
      {
        "name": "onEndpointPrefChange",
        "type": "function",
        "parameters": []
      }
    ],
    "functions": [
      {
        "name": "getEndpointPref",
        "type": "function",
        "description": "Get the endpoint preference's value",
        "parameters": [],
        "async": true
      },
      {
        "name": "setEndpointPref",
        "type": "function",
        "description": "Set the endpoint preference's value",
        "parameters": [
          {
            "name": "value",
            "type": "string",
            "description": "The new value"
          }
        ],
        "async": true
      }
    ]
  }
]