YMail Notifier will add a little status-bar icon that will notifies you when you get new Yahoo! Mail. Click on it to change the frequency of checking and other settings.

When new mail arrives you can choose to be notified with sound, a sliding alert, or by running an external application. When there is no mail, the status-bar icon hides itself (optional) to avoid cluttering the screen.

Requirements:

· Firefox: 1.0 – 2.0.0.