For the Fasterfox Firefox Extension to work with K-Meleon 74.0 and K-Meleon 75.0 Beta, download Fasterfox
https://addons.cdn.mozilla.net/user-media/addons/12878/fasterfox-3.9.85-fx.xpi and rename it to {c36177c0-224a-11da-8cd6-0800200c9a91}.xpi
Next copy {c36177c0-224a-11da-8cd6-0800200c9a91}.xpi into the extensiosn folder.
Then download Fasterfox
http://kmext.sourceforge.net/extensions/kmfasterfox.7z from K-Mwleon Extensions Central
Last extract macros from Fasterfox
http://kmext.sourceforge.net/extensions/kmfasterfox.7z into the K-Meleon Root Folder.