It's just Pale Moon with a Raccoon on it.
But it's still supported on these ancient OSes, so it's a net-gain essentially. They even come with all the necessities you need with not one instance of the "Your Browser is Outdated" or "This Feature is Missing" bullcrap.
Just posting this in case some of you still use XP or 2003:
https://github.com/Feodor2/Mypal/