This site is not affiliated with Mozilla in any way. Among its main features are the option of being able to browse several websites at. Mozilla continues working on more improvements for its star product: the free and open source browser, Firefox. Lightbeam is a browser extension that uses interactive visualizations to show you the relationships between third parties and the sites you visit. This version fixes many bugs, improves standards compliance.Firefox is backed by the non-profit Mozilla, who keeps the Internet healthier through programs that support tech education for girls, create trust around factual news, bring civility to the comments. Firefox 3.0 uses version 1.9 of the Gecko layout engine for displaying web pages. Mozilla Firefox 3.0 is a version of the Firefox web browser released on Jby the Mozilla Corporation. Version 3.5 was touted as being twice as fast as 3.0 (due its TraceMonkey JavaScript engine and rendering improvements). Mozilla Firefox 3.5 is a version of the Firefox web browser released in June 2009, adding a variety of new features to Firefox.