There was a day when many people used a Firefox addon that rewrote hxxps to https and would undefang the IP addresses. I can't remember what it's called but these days I use FoxReplace to do similar things. If I want to obfuscate things I typically base64 encode for the laptop and workstation users.

    Q3V6IEkgYW0gcGlwcGkgbG9uZ3N0b2NraW5ncyBob3BlIGFuZCBhIGhheSBhbmQgYSBob3BlIHNoYXcgbmF3Lg==