From: vasant kanchan <v_kanchan@yahoo.com>
Subject: Xlib based mozilla 1.3 on NetBSD 1.6
Date: Mon, 7 Apr 2003 12:08:10 -0700 (PDT)

> I have successfully installed the mozilla pkg on
> a NetBSD 1.6 system. The default build creates a
> GTK+ based mozilla. I would like to build Xlib based
> mozilla. How can I do that ?. Thanks for your help.

IIRC add --enable-default-toolkit=xlib to configure arg.
But AFAIK mozilla with X11 is experimental.
I recommend normal build(with gtk).