The `uuid` module provides a low level API for generating or parsing UUIDs. It exports a single function, uuid(). For more details about UUID representations and what they are used for by the platform see the MDN documentation for [JSID](https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIJSID). ## Generate UUID To generate a new UUID, call `uuid()` with no arguments: let uuid = require('sdk/util/uuid').uuid(); ## Parsing UUID To convert a string representation of a UUID to an `nsID`, pass the string representation to `uuid()`: let { uuid } = require('sdk/util/uuid'); let firefoxUUID = uuid('{ec8030f7-c20a-464f-9b0e-13a3a9e97384}'); @function Generate a new [UUID](https://developer.mozilla.org/en-US/docs/Generating_GUIDs), or convert a string representation of a UUID to an `nsID`. @param stringId {string} String representation of a UUID, such as:

"8CBC9BF4-4A16-11E2-AEF7-C1A56188709B"

Optional. If this argument is supplied, it will be converted to an `nsID` and returned. Otherwise a new `nsID` will be generated and returned. @returns {nsID} A UUID, represented as an `nsID` object.