nsIUpdatePrompt Interface

 Shows a user interface that checks for and then displays the available
 updates.

void checkForUpdates()

 Show a message advising that an update is available for download and
 install.
 @param   update
          The update to be downloaded and installed

void showUpdateAvailable(in nsIUpdate update)

 Show a message advising that an update has now been downloaded and that
 the user should restart their software should be restarted so that the
 update can be installed.
 @param   update
          The update that was downloaded

void showUpdateDownloaded(in nsIUpdate update)

 Shows an error message UI telling the user about some kind of update
 failure, e.g. failure to apply patch.
 @param   update
          The nsIUpdate object which we could not install

void showUpdateError(in nsIUpdate update)

 Shows a list of all updates installed to date.
 @param   parent
          A parent window to anchor this window to. Can be null.

void showUpdateHistory(in nsIDOMWindow parent)

 Shows a message detailing the update which was installed.
 @param   update
          The nsIUpdate object which was just installed

void showUpdateInstalled(in nsIUpdate update)