Safari works but Firefox doesn't with DNS

[macmacmacr]

When I use Safari Version 11.1 (11605.1.33.1.4) and I go to http://www.flightofthephantom.com/what-is-an-imu it works but If I use Firefox 59.02 on the same workstation it doesn't work it comes up with a black screen. I am using FrereDNS 37.235.1.174, 37.235.1.177 but when I change the DNS to google or my ISP both browsers work.

Why does Safari work and Firefox doesn't? Is Safari bypassing the Mac OS network DNS settings?

 

[macmacmacr]

This is a problem with firefox. See "web site not viewable" in https://support.mozilla.org

 

[jbarley]

This is a problem with firefox. See "web site not viewable" in https://support.mozilla.org

That link works for me running FireFox...

 

[macmacmacr]

That link works for me running FireFox...

View attachment 761336

The problem is not with the Web site or DNS. See Firefox https://support.mozilla.org forum title "web site not viewable" for details.