Mozilla began as a project a few years ago, to be the dominant open-source web browser, and eventually the aim was for the HTML engine (the part which displays web pages) to be integrated/used by the newer versions of Netscape Navigator.

While Netscape 6 used the newest version of Mozilla's "Gecko" engine at the time, it was very much beta software and as such, unreliable.

Mozilla passed its milestone 1.0 release on 5th June 2002, and will continue to be developed, very much as open source, though through its own license, the MPL (Mozilla Public License), which aims to ensure that any improvements made to the main source code are made available to all.

Note that Mozilla is still very much 'in development' and will continue to be - often the most recent release is an update of that of the previous day's coding - it works almost by daily milestone coding practices.

The main site is mozilla.org, and its open-source attitude has spawned several projects, each similarly altruistic in nature - including the Mozilla Directory, or 'Open Directory Project' at dmoz.org and MusicMoz (purely for music) at musicmoz.org.