[
  {
    "namespace": "manifest",
    "types": [
      {
        "$extend": "Permission",
        "choices": [
          {
            "type": "string",
            "pattern": "^experiments(\\.\\w+)+$"
          }
        ]
      },
      {
        "$extend": "WebExtensionManifest",
        "properties": {
          "experiment_apis": {
            "type": "object",
            "additionalProperties": { "$ref": "experiments.ExperimentAPI" },
            "optional": true,
            "privileged": true
          }
        }
      }
    ]
  },
  {
    "namespace": "experiments",
    "types": [
      {
        "id": "ExperimentAPI",
        "type": "object",
        "properties": {
          "schema": { "$ref": "ExperimentURL" },

          "parent": {
            "type": "object",
            "properties": {
              "events": {
                "$ref": "APIEvents",
                "optional": true,
                "default": []
              },

              "paths": {
                "$ref": "APIPaths",
                "optional": true,
                "default": []
              },

              "script": { "$ref": "ExperimentURL" },

              "scopes": {
                "type": "array",
                "items": { "$ref": "APIParentScope", "onError": "warn" },
                "optional": true,
                "default": []
              }
            },
            "optional": true
          },

          "child": {
            "type": "object",
            "properties": {
              "paths": { "$ref": "APIPaths" },

              "script": { "$ref": "ExperimentURL" },

              "scopes": {
                "type": "array",
                "minItems": 1,
                "items": { "$ref": "APIChildScope", "onError": "warn" }
              }
            },
            "optional": true
          }
        }
      },
      {
        "id": "ExperimentURL",
        "type": "string",
        "format": "unresolvedRelativeUrl"
      },
      {
        "id": "APIPaths",
        "type": "array",
        "items": { "$ref": "APIPath" },
        "minItems": 1
      },
      {
        "id": "APIPath",
        "type": "array",
        "items": { "type": "string" },
        "minItems": 1
      },
      {
        "id": "APIEvents",
        "type": "array",
        "items": { "$ref": "APIEvent", "onError": "warn" }
      },
      {
        "id": "APIEvent",
        "type": "string",
        "enum": ["startup"]
      },
      {
        "id": "APIParentScope",
        "type": "string",
        "enum": ["addon_parent", "content_parent", "devtools_parent"]
      },
      {
        "id": "APIChildScope",
        "type": "string",
        "enum": ["addon_child", "content_child", "devtools_child"]
      }
    ]
  }
]