For the Firefox Extension to work with K-Meleon 74.0 and K-Meleon 75.0 Beta, download refsoof
https://addons.cdn.mozilla.net/user-media/addons/4513/refspoof-0.9.5-fx.xpi and rename it to
refspoof@mozdev.org.xpi
Next copy
refspoof@mozdev.org.xpi into the extensiosn folder.
Then ownload RefSpoof
http://kmext.sourceforge.net/extensions/kmrefspoof.7z from K-Mwleon Extensions Central Privacy & Security Extensions.
Last extract macros from RefSpoof
http://kmext.sourceforge.net/extensions/kmrefspoof.7z into the K-Meleon Root Folder.