XulRunner Introduction
XULRunner is currently a technology in development which provides a runtime environment for XUL applications. All XUL based applications using Mozilla technologies such as FireFox, Thunderbird, Democracy Player, Songbird, and others will be able to be executed using this product.
Currently XULRunner 1.8.0.4 is the most stable build so far with XULRunner 1.9 (the first production version) scheduled to be released with Firefox 3 late into 2007.