Try going to http://orbusmax.com/firefox.html, which is still blocking Firefox. It blocks PaleMoon also.
I was able to load orbusmax from Firefox simply by changing the user agent to IE 8.
I've never been to Orbusmax. Apparently their web developers aren't as good as the developers at Redstate when it comes to knowing the difference between FF and PM. I barely ever go to Redstate. As long as FR doesn't block PM I'll be OK.