An interface describing an object that listens to the progress of an update
check operation. This object is notified as the check continues, finishes
and if it has an error.
The update check was completed.
| request | The nsIXMLHttpRequest handling the update check. |
| updates | An array of nsIUpdate objects listing available updates. |
| updateCount | The size of the |updates| array. |
An error occurred while loading the remote update service file.
| request | The nsIXMLHttpRequest handling the update check. |
| update | A nsIUpdate object that contains details about the error in its |statusText| property. |