 This version fixes many bugs, improves standards compliance, and implements many new web APIs compared to Firefox 2.0.Other new features include a redesigned download manager, a new "Places" system for storing bookmarks and history, and separate themes for different operating systems.Firefox 3.0 had over 8 million unique downloads the day it was released, and by July 2008 held over 5.6% of the recorded usage share of web browsers.