The name of this update. This will be used to display the name of the update in Check for Updates. The version number of this update. This *must* match the version number of the extension being installed. The name of the author of this update. This wil be displayed in check for updates. The URL of a webpage for the update author. A link will be created to this page from Check for Updates. A description of the update. This should be a short (1-2 line) overview of the functionality provided by the update. Specifies requirements that must be satisfied before this update can be installed. A requirement that an extension must be present or available for install at the same time as this update. The id of the required extension. The minimum acceptable version of the required extension. The maximum acceptable version of the required extension. Specifies that the user must agree to a license before installing this update. The url of the license for this update. This can be a relative or absolute URL.