The history of Mozilla, upon which Firefox was built, extends all the way back to 1994, when the name was first established as a branding for the “mosaic killer,” Netscape Navigator. Mozilla as a modern day institution found its beginnings in 1998, when Netscape decided to release the source code of its dying browser to the open source community. Even later still, the browser that would become Firefox did not come into existence until 2002. In a sense, Firefox 1.0 came out in 2004 after 10 years of laying its foundations.
The origins of Firefox can be traced directly to Netscape, a company whose Web browser, Netscape Navigator, was the dominant browser before Microsoft developed Internet Explorer. The internal company name for the browser was Mozilla. Eventually, Netscape released the source code for Navigator under an open source license, meaning anyone could see and use the code. A nonprofit group was set up to direct the development of browsers using this code. This group became the Mozilla Foundation in 2003.
However, Firefox is not the browser the Mozilla group would have released if everything had gone as planned. Like Netscape Navigator before it, the Mozilla software was becoming bigger and bigger as more features were added in a problem in software development known as "feature creep" or "bloat".
Around this time, the Firefox project was started as an experimental branch of the Mozilla project by Dave Hyatt, Joe Hewitt, Chanial and Blake Ross. Instead of accepting the feature creep, Blake Ross, (a computer enthusiast who first started helping out the Mozilla project as a hobby when he was 14) decided to start developing his own Mozillabased browser, focusing on a streamlined and simple version. Software developer Dave Hyatt also played a major role. Ross was joined by Ben Goodger in 2003, and development progressed rapidly from that point.
They believed that the commercial requirements of Netscape's sponsorship and developer driven feature creep compromised the utility of the Mozilla browser. To combat this perceived software bloat of the Mozilla Suite  they created a standalone 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.
Although the Mozilla Foundation had intended to make the Mozilla Suite obsolete and replace it with Firefox, the Foundation continued to maintain the suite until April 12, 2006 because it had many corporate users and was bundled with other software. The Mozilla community (as opposed to the Foundation) continues to release new versions of the suite, using the product name SeaMonkey to avoid confusion with the original Mozilla Suite. On February 5, 2004, business and IT consulting company AMS categorized Mozilla Firefox (then known as Firebird) as a "Tier 1" ("Best of Breed") open source product, considering it technically strong and virtually riskfree.
Phoenix : The project which became Firefox started as an experimental branch of the Mozilla Suite called m/b (or mozilla/browser), underwent several name changes. After it had been sufficiently developed, binaries (experimental versions) for public testing appeared in September 2002 under the name Phoenix. The Phoenix name was kept until April 14, 2003, when it was changed because of a trademark dispute with the BIOS manufacturer, Phoenix Technologies (which produces a BIOSbased browser called Phoenix FirstWare Connect).
Manticore : The foundations of Phoenix progressed along an entirely different development mindset from its parent Mozilla. Instead of focusing on large application suites developed by large development teams headed by senior programmers, Phoenix centered around a small, core development team concentrated exclusively on the web browsing aspect of the Mozilla Suite. The ideas for these small volunteer projects had manifested themselves earlier with David Hyatt and Ben Goodger's Manticore browser, built on Netscape and Internet Explorer using C# and .NET. However, where Manticore looked to offer basic browsing functions in a lean form factor, Blake Ross and David Hyatt's Phoenix looked to innovate on the browsing experience, focusing on security and utility as the pillars of the new browser. Unconstrained by the businessminded Netscape, Ross and Hyatt could develop a browser "completely focused on the end user."
Firebird : In April, 2003, Mozilla announced it would call its new browser "Firebird"a mythical creature sometimes considered synonymous with the phoenix, an immortal bird that regenerates itself through selfimmolation, to avoid the Phoenix conflict. The new name, Firebird, met with mixed reactions, particularly as the Firebird database server already carried the name. It provoked an intense response from the Firebird free database software project. In response, the Mozilla Foundation stated that the browser should always bear the name Mozilla Firebird to avoid confusion with the database software. Confusingly enough, the sponsor of the Firebird database development group, went by the name of IBPhoenix (no relationship to Phoenix Technologies, which presented the initial trademark challenge to Mozilla). Formed in 1984 by InterBase Software and acquired by Borland Software in 1991, the group had launched the Firebird free database opensource project in 2000.
Firefox : Continuing pressure from the Firebird community forced another change, and on February 9, 2004 the project was renamed Mozilla Firefox (or Firefox for short). The name "Firefox" (a reference to the red panda ) was chosen for its similarity to "Firebird", but also for its uniqueness in the computing industry. To ensure that no further name changes would be necessary, the Mozilla Foundation began the process of registering Firefox as a trademark with the United States Patent and Trademark Office in December 2003. This trademark process led to a delay of several months in the release of Firefox 0.8 when the foundation discovered that Firefox had already been registered as a trademark in the UK for Charlton Company software. The situation was resolved when the foundation was given a license to use Charlton's European trademark.
The Firefox project went through many versions before 1.0 was released on November 9, 2004. After a series of stability and security fixes, the Mozilla Foundation released its first major update, Firefox version 1.5, on November 29, 2005. Version 2.0 was released on October 24, 2006. Firefox 3.0 was released on June 17, 2008, with Version 3.5 and Version 3.6 released on June 30, 2009 and January 21, 2010 respectively. Version 4.0 was released on March 22, 2011. With Version 5.0 onwards the rapid release cycle was realised which envisions a new major version release every six weeks on Tuesday. Firefox 10, was released on January 31, 2012. The latest version, Firefox 10.0.2 was released on February 16, 2012
- Software bloat is a process whereby successive versions of a computer program include an increasing proportion of unnecessary features that are not used by end users, or generally use more system resources than necessary, while offering little or no benefit to its users.
- Mozilla Suite: Codenamed, internally referred to, and continued by the community as SeaMonkey, which integrated features such as IRC, mail and news, and WYSIWYG HTML editing into one software suite.
- A firefox is another name for the red panda, a redfurred, endangered mammal found in the Himalayas, China and Myanmar.