For RefControl to work with K-Meleon 74.0 and K-Meleon 75.0 Beta 1. download RefControl
https://addons.cdn.mozilla.net/user-media/addons/953/refcontrol-0.8.16-sm+fx.xpi and rename it to {455D905A-D37C-4643-A9E2-F6FEFAA0424A}.xpi
Then download RefControl
http://kmext.sourceforge.net/km74/refcontrol-km74.7zfor K-Mleleon 74 and extract macros to the k-Meleon Root Folder.
When I tried the macro from Refcontrol extra: includes spoof protocol hxxp
http://kmext.sourceforge.net/km74/refcontrol2hxxpspoof-km74.7z with RefControl Firefox Extension, Refcontrol extra: includes spoof protocol hxxp did not work with K-Meleon 74.0 and K-Meleon 75.0 Beta 1.
I received the msessage on "Undefined Protocol" for hxxp in K-Meleon 74.0 and K-Meleon 75.0 Beta 1
List with Links to Firefox Addons that work for 74/75
http://kmeleonbrowser.org/forum/read.php?9,131158