This is a Magento 1 extension, providing backend configuration masks for kreXX.
kreXX mainlibrary: https://github.com/brainworxx/kreXX
Magento Repository: https://www.magentocommerce.com/magento-connect/krexx-debugger.html
The TYPO3 and the Magento extension are essentially the same, so the Documentation can be found here: