Note that for KHelpCenter to function, it must be specified at runtime.  For 
example:

guix shell privacybrowser khelpcenter -- privacybrowser

It seems there are a few missing icons and there are some warnings written to 
the console.  I assume that relates to some deficiency in the KHelpCenter 
package.  But all the text of the Handbook can be read.

-- 
Soren Stoutner
soren@stoutner.com