.XUL

.XUL file extension

This is the basic program to work with .XUL extension

SeaMonkey

SeaMonkey Mozilla XUL Document

The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. Such a software suite was previously made popular by Netscape and Mozilla, and the SeaMonkey project continues to develop and deliver high-quality updates to this concept... (more)

The program works with the following extensions: gif, ico, jpg, png, htm, xml, bmp, jpeg, html, dib, xul, jpe, xbm, svg, mfp, eml, mng, xht, pjp, jfif, svgz, xhtml, shtml, pjpeg and xevgenxml

.XUL extension is also supported by the following programs:

Mozilla

Mozilla Mozilla XUL Document

Firefox is now easier to update with one less prompt.
Netscape

Netscape Mozilla XUL Document

Netscape 6 (formerly Netscape Communicator) is the first Internet software to seamlessly integrate b...
Firefox

Firefox Mozilla XUL Document

Browse the Internet securely on a customizable browser with tabbed interface.
IncrediMail

IncrediMail Mozilla XUL Document

It is an e-mail client program designed for replacing your regular e-mail app.