User can set the time interval for receiving notifications from the Preferences window. This time interval measures the time interval after which the checking for any new extension should be done. The default time interval is set at 30 minutes.
What is particularly nice about the What`s New! extension is that it remembers the latest notification sent to the user. No notification will be displayed if no new extension is available.
Click-able link in the notification will take you to that extension`s page.