FirePHP enables you to log to your Firebug Console using a simple PHP method call.
Not using Firebug 1.9+ on Firefox 8+? See http://firephp.org/
RAMBack will cause Firefox to issue an internal notification to free up memory that is otherwise held for performance purposes. Additional items will be hooked into this notification in the future.
This Add-on allows you to download every track from Soundcloud and in addition it gives you recommendations! After installing this Add-on you will have a new Download button at every track.
Move Firefox Button to anywhere you want, and make it also available in Full Screen mode, or when Menu Bar is showing.