Mozilla Firefox 3 was released on June 17, 2008, by the Mozilla Corporation. Firefox 3 uses version 1.9 of the Mozilla Gecko layout engine for displaying web pages. The new version fixes many bugs, improves standard compliance, and implements new web APIs. Other new features include a redesigned download manager, a new "Places" system for storing bookmarks and history, and separate themes for different operating systems. The latest version under 3.0 is Firefox 3.0.13.
Development stretches back to the first Firefox 3 beta (under the codename 'Gran Paradiso') which had been released several months earlier on 19 November 2007, and was followed by several more beta releases in spring 2008 culminating in the June release.Firefox 3 had more than 8 million unique downloads the day it was released, setting a Guinness World Record.