I can't access sites like Eros or P411 using XFinity (Comcast) but I can when I switch to the Verizon LTE network.  Anyone know what might be going on?

Do a search for Comcast and censorship of sites. All kinds of stuff comes up. I particularly liked:

If you don't mind Google having even MORE data on how you use the internet, use 8.8.8.8 and/or 8.8.4.4.  There are other public DNS servers, but that's most likely how they're censoring.

but no problem with Chrome.

I don't use Chrome that often.  But, I do know they were playing with custom DNS settings that would ignore the system settings.  I also knows it prefetches items, which in certain cases may do an end run around any block an ISP puts in.

I let p411 know and they seemed to have fixed the problem.  Eros was apparently 'down' for awhile earlier today.  Thanks for all of the suggestions.