This is very convincing evidence that my installation of Mozilla 1.3 does support 128-bit encryption and they cannot deny it. I reported the problem to them.
So I complain them and their answer was the familiar "We don't support Mozilla" period. What surprises me further is that they do support Netscape 4.x, but they don't Netscape 6 or 7.
T. "Kuro" Kurosaka