Sothink Web Video Downloader for Firefox released version 5.3, which is licensed under The GNU General Public License.

If you want to get the source code of this software, please make sure you have installed the latest version of Sothink Web Video Downloader for Firefox (currently is V5.3). Then go to the default locations of Firefox profiles, for example, at C:\Documents and Settings\\Application Data\Mozilla\Firefox\Profiles\xxxxxxxx.default\. Finally, you will find the full source code of this software under the path: extension\{FCAB6FDD-5585-425b-95C1-5ED856F3FD08}\components. Hope it useful!