Mozilla Firefox is a free and open source web browser developed for Microsoft Windows, Mac OS X, and Linux coordinated by Mozilla Corporation and Mozilla Foundation.
Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards.
As of May 2012, Firefox has approximately 25% of worldwide usage share of web browsers, making it the third most widely used web browser.
The browser has had particular success in Indonesia, Germany and Poland, where it is the most popular browser with 67%, 50% and 44% of the market share respectively.
The Firefox project began as an experimental branch of the Mozilla project by Dave Hyatt, Joe Hewitt and Blake Ross.
They believed the commercial requirements of Netscape's sponsorship and developer-driven feature creep compromised the utility of the Mozilla browser.
To combat what they saw as the Mozilla Suite's software bloat, they created a stand-alone browser, with which they intended to replace the Mozilla Suite.
On April 3, 2003, the Mozilla Organization announced that they planned to change their focus from the Mozilla Suite to Firefox and Thunderbird.