Module `uuid` provides low level API for generating / parsing UUID, that may be necessary when hacking on internals of the platform. ## Generate UUID Module exports `uuid` function. When called without arguments it will uses platform-specific methods to obtain a `nsID` that can be considered to be globally unique. let uuid = require('api-utils/uuid').uuid() ## Parsing UUID Sometimes one might need to create `nsID` from an existing UUID string. Same `uuid` function may be used to parse such UUID strings into an `nsID`: let { uuid } = require('api-utils/uuid'); let firefoxUUID = uuid('{ec8030f7-c20a-464f-9b0e-13a3a9e97384}'); For more details about UUID representations and what they are used for by the platform see MDN documentation for [JSID](https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIJSID)