After Google Reader Styles, which even is mentioned on Apple’s Extension Gallery, I’ve finished my second Safari Extension today. It’s called Facebook Chat Sound Changer and changes the annoying new alert sound of the Facebook Chat to the old and familiar „pop“ sound. Just download, install and activate the extension and you’re done! The old chat alert will be automatically replaced with the old one. If you want to revert to the new alert, just deactivate the extension.
Download: Facebook Chat Sound Changer