You are looking at the Conkeror tutorial. See end for copying conditions.
Copyright (c) 2004 Shawn Betts.
This tutorial descends from a long line of Conkeror tutorials starting with the one written by Shawn Betts for the original Conkeror.
This version of the tutorial, like Conkeror, is copyrighted, and comes with permission to distribute copies on certain conditions:
Copyright (c) 2004 Shawn Betts. Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and permission notice are preserved, and that the distributor grants the recipient permission for further redistribution as permitted by this notice. Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last altered them.
The conditions for copying Conkeror itself are more complex, but in the same spirit. Please read the copyright notice in the source files and then do give copies of Conkeror to your friends. Help stamp out software obstructionism ("ownership") by using, writing, and sharing free software!