[
  {
    "namespace": "manifest",
    "types": [
      {
        "$extend": "OptionalPermission",
        "choices": [
          {
            "type": "string",
            "enum": ["sessions"]
          }
        ]
      }
    ]
  },
  {
    "namespace": "sessions",
    "description": "Use the <code>chrome.sessions</code> API to query and restore tabs and windows from a browsing session.",
    "permissions": ["sessions"],
    "types": [
      {
        "id": "Filter",
        "type": "object",
        "properties": {
          "maxResults": {
            "type": "integer",
            "minimum": 0,
            "maximum": 25,
            "optional": true,
            "description": "The maximum number of entries to be fetched in the requested list. Omit this parameter to fetch the maximum number of entries ($(ref:sessions.MAX_SESSION_RESULTS))."
          }
        }
      },
      {
        "id": "Session",
        "type": "object",
        "properties": {
          "lastModified": {
            "type": "integer",
            "description": "The time when the window or tab was closed or modified, represented in milliseconds since the epoch."
          },
          "tab": {
            "$ref": "tabs.Tab",
            "optional": true,
            "description": "The $(ref:tabs.Tab), if this entry describes a tab. Either this or $(ref:sessions.Session.window) will be set."
          },
          "window": {
            "$ref": "windows.Window",
            "optional": true,
            "description": "The $(ref:windows.Window), if this entry describes a window. Either this or $(ref:sessions.Session.tab) will be set."
          }
        }
      },
      {
        "id": "Device",
        "type": "object",
        "properties": {
          "info": { "type": "string" },
          "deviceName": {
            "type": "string",
            "description": "The name of the foreign device."
          },
          "sessions": {
            "type": "array",
            "items": { "$ref": "Session" },
            "description": "A list of open window sessions for the foreign device, sorted from most recently to least recently modified session."
          }
        }
      }
    ],
    "functions": [
      {
        "name": "forgetClosedTab",
        "type": "function",
        "description": "Forget a recently closed tab.",
        "async": true,
        "parameters": [
          {
            "name": "windowId",
            "type": "integer",
            "description": "The windowId of the window to which the recently closed tab to be forgotten belongs."
          },
          {
            "name": "sessionId",
            "type": "string",
            "description": "The sessionId (closedId) of the recently closed tab to be forgotten."
          }
        ]
      },
      {
        "name": "forgetClosedWindow",
        "type": "function",
        "description": "Forget a recently closed window.",
        "async": true,
        "parameters": [
          {
            "name": "sessionId",
            "type": "string",
            "description": "The sessionId (closedId) of the recently closed window to be forgotten."
          }
        ]
      },
      {
        "name": "getRecentlyClosed",
        "type": "function",
        "description": "Gets the list of recently closed tabs and/or windows.",
        "async": "callback",
        "parameters": [
          {
            "$ref": "Filter",
            "name": "filter",
            "optional": true,
            "default": {}
          },
          {
            "type": "function",
            "name": "callback",
            "parameters": [
              {
                "name": "sessions",
                "type": "array",
                "items": { "$ref": "Session" },
                "description": "The list of closed entries in reverse order that they were closed (the most recently closed tab or window will be at index <code>0</code>). The entries may contain either tabs or windows."
              }
            ]
          }
        ]
      },
      {
        "name": "getDevices",
        "unsupported": true,
        "type": "function",
        "description": "Retrieves all devices with synced sessions.",
        "async": "callback",
        "parameters": [
          {
            "$ref": "Filter",
            "name": "filter",
            "optional": true
          },
          {
            "type": "function",
            "name": "callback",
            "parameters": [
              {
                "name": "devices",
                "type": "array",
                "items": { "$ref": "Device" },
                "description": "The list of $(ref:sessions.Device) objects for each synced session, sorted in order from device with most recently modified session to device with least recently modified session. $(ref:tabs.Tab) objects are sorted by recency in the $(ref:windows.Window) of the $(ref:sessions.Session) objects."
              }
            ]
          }
        ]
      },
      {
        "name": "restore",
        "type": "function",
        "description": "Reopens a $(ref:windows.Window) or $(ref:tabs.Tab), with an optional callback to run when the entry has been restored.",
        "async": "callback",
        "parameters": [
          {
            "type": "string",
            "name": "sessionId",
            "optional": true,
            "description": "The $(ref:windows.Window.sessionId), or $(ref:tabs.Tab.sessionId) to restore. If this parameter is not specified, the most recently closed session is restored."
          },
          {
            "type": "function",
            "name": "callback",
            "optional": true,
            "parameters": [
              {
                "$ref": "Session",
                "name": "restoredSession",
                "description": "A $(ref:sessions.Session) containing the restored $(ref:windows.Window) or $(ref:tabs.Tab) object."
              }
            ]
          }
        ]
      },
      {
        "name": "setTabValue",
        "type": "function",
        "description": "Set a key/value pair on a given tab.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": 0,
            "name": "tabId",
            "description": "The id of the tab that the key/value pair is being set on."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value being set."
          },
          {
            "type": "any",
            "name": "value",
            "description": "The value being set."
          }
        ]
      },
      {
        "name": "getTabValue",
        "type": "function",
        "description": "Retrieve a value that was set for a given key on a given tab.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": 0,
            "name": "tabId",
            "description": "The id of the tab whose value is being retrieved from."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value."
          }
        ]
      },
      {
        "name": "removeTabValue",
        "type": "function",
        "description": "Remove a key/value pair that was set on a given tab.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": 0,
            "name": "tabId",
            "description": "The id of the tab whose key/value pair is being removed."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value."
          }
        ]
      },
      {
        "name": "setWindowValue",
        "type": "function",
        "description": "Set a key/value pair on a given window.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": -2,
            "name": "windowId",
            "description": "The id of the window that the key/value pair is being set on."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value being set."
          },
          {
            "type": "any",
            "name": "value",
            "description": "The value being set."
          }
        ]
      },
      {
        "name": "getWindowValue",
        "type": "function",
        "description": "Retrieve a value that was set for a given key on a given window.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": -2,
            "name": "windowId",
            "description": "The id of the window whose value is being retrieved from."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value."
          }
        ]
      },
      {
        "name": "removeWindowValue",
        "type": "function",
        "description": "Remove a key/value pair that was set on a given window.",
        "async": true,
        "parameters": [
          {
            "type": "integer",
            "minimum": -2,
            "name": "windowId",
            "description": "The id of the window whose key/value pair is being removed."
          },
          {
            "type": "string",
            "name": "key",
            "description": "The key which corresponds to the value."
          }
        ]
      }
    ],
    "events": [
      {
        "name": "onChanged",
        "description": "Fired when recently closed tabs and/or windows are changed. This event does not monitor synced sessions changes.",
        "type": "function"
      }
    ],
    "properties": {
      "MAX_SESSION_RESULTS": {
        "value": 25,
        "description": "The maximum number of $(ref:sessions.Session) that will be included in a requested list."
      }
    }
  }
]