The keyword "Extreme-modding.de Ps4 Database Games.html" represents an earlier era of PS4 modding. In the early days of the PS4 exploit scene (firmwares 1.76 through 5.05), tools were often rudimentary scripts or simple web interfaces hosted on local servers to interact with the console via the browser.
Avoid downloading random HTML files from German modding sites if you are a casual user. If you are serious about PS4 modding:
Extreme-modding.de was a prominent German website that served as a hub for console modification services and tools. During the peak of the PS3 and PS4 modding scenes, the site was known for hosting homebrew applications, save-game resigners, and tutorials.
Disclaimer: This article is for educational and informational purposes only. Modifying your PlayStation 4 voids your warranty, violates Sony's Terms of Service, and may result in a permanent console ban. The author does not condone piracy or online cheating.