Source Code
Source Code may be checked out through SourceForge's CVS server. If you're not familiar with CVS, you can find documentation about it at www.cvshome.org. You can access the code using the following commands:
cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/xulbrowser login cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/xulbrowser co -P xulbrowser
You can also browse the source through the CVS Source Viewer.