A fast, sleek new version of Firefox was released on Wednesday to vie Microsoft's Internet Explorer 9 (IE9) and Google Chrome in the fiercely competitive market for Web browsing software.
Nonprofit group Mozilla made Firefox 4 available as a free download to computers powered by Windows, Mac OS X or Linux operating systems in more than 80 languages.
Firefox 4 was build as six times faster than its predecessor and boasted features including a "Do Not Track" signal to opt-out of having online activities recorded by websites for targeted online ads or services.
The open-source Web browsing software was also designed as a stage for rich video or game graphics based on the HTML5 standard being touted as a boon for online visual experiences.
"Firefox puts users in control of their Web experience, providing a streamlined user interface, fun new features, a boost in speed and support for modern Web technologies," Mozilla said in an online message.