For the Tamper Data Firefox Extension to work with K-Meleon 74.0 and K-Meleon 75.0 Beta, download Tamper Data
https://addons.cdn.mozilla.net/user-media/addons/966/tamper_data-11.0.1-fx.xpi and rename it to {9c51bd27-6ed8-4000-a2bf-36cb95c0c947}.xpi
Next copy {9c51bd27-6ed8-4000-a2bf-36cb95c0c947}.xpi into the extensiosn folder.
Then download Tamper Data h
http://kmext.sourceforge.net/extensions/TamperData.7z from K-Mwleon Extensions Central
Last extract macros from Tamper Data
http://kmext.sourceforge.net/extensions/TamperData.7z into the K-Meleon Root Folder.