Noise is a Firefox extension which plays a sound (a .wav file you chose) while event happening, informs you when different actions occur through a beep.
Be always on alert with this very useful and small Firefox extension.
Noise Features:
Noise also lets events below to send notification. So we can capture them by observe the topics:
1. Findbar wrapped (noise-TypeAheadFind.FIND_WRAPPED)
2. Toggle sidebar (noise-toggleSidebar)
3. Alert notificationbox (noise-alert-loaded)
4. Start navigation (noise-WebProgress-start) learned much from PopupSound extension
5. Stop navigation (noise-WebProgress-stop)
6. Change location (noise-WebProgress-locationChange)

Requirements:
* Firefox

The license of this software is Freeware, you can free download and free use this browser plug-ins software.