Firefox 4.0 Beta 7 Open Source

• Firefox is the second most widely used browser, with 30% of worldwide usage share of web browsers.Firefox is the most popular browser with 60% usage.[12]Firefox uses the Gecko layout engine, which implements most current web standards
• The latest Firefox features[14] include tabbed browsing, spell checking, incremental find, live bookmarking, a download manager, private browsing
• Firefox runs on various operating systems including Microsoft Windows, GNU/Linux, Mac OS X, FreeBSD,
• Firefox uses a sandbox security model
• Mozilla Firefox implements many web standards, including HTML, XML, XHTML, MathML, SVG 1.1 (partial),[84] CSS (with extensions),[85] ECMAScript (JavaScript), DOM, XSLT, XPath, and APNG (Animated PNG) images with alpha transparenc