Yahoo! Mail Notifier 1.0.7.4.1-signed.1-let-fixed.1-signed Requires Restart
by Michael Kraft
This extension notifies you when new messages arrive in your Yahoo mailbox.
About this Add-on
Notification options include: customizable sound, notification alert, status bar and toolbar icon. Also allows the user to map different mouse buttons to open Yahoo Mail in different tabs,windows,etc.
In Firefox 28 and up, right or long click on any toolbar, choose customize and drag the icon to any toolbar.