Terms and Conditions of Use
Why this Add-on Exists
This add-on incorporates several interesting behaviors that may be of interest to other developers. A github repository is maintained for availability of the source code.
What the Add-on Does
This add-on enables you to download mp3 files directly from Grooveshark. After installation, a toolbar button will appear which allows you to easily toggle Groove Shredder on or off. When enabled, Groove Shredder will add a download button to Grooveshark's Now playing section, and a link to the preferences at the top of the page.
The default filename, the download location, as well as automatic downloading are customizable in the preferences.
This add-on is known (and is supposed) to work cross-platform.