In recent years Mozilla has also focused on maximizing browsing area by simplifying toolbar controls to just a Firefox button (which contains settings and options) and back/forward buttons. They created the tab structure that has been adopted by most other browsers. Mozilla put of a lot of resources into creating a simple but effective UI aimed at making browsing quicker and easier. The browser is particularly popular with developers thanks to its open source development and active community of advanced users. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally and this is set to continue thanks to the release of Firefox 30. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Mozilla Firefox (64-bit) - Mozilla Firefox is a fast, light and tidy open source web browser.