I doubt Firefox itself does, but Wilders Security Forums is using them. That's where we are hosted (LiquidWeb). What are you seeing exactly that makes you ask?
Hi LWM ...... don't see you around much these days ........i have been seeing what would be expected and thought is WAS Wilders, but interestingly, i was unable to block their severs when, for the heck of it, i tried.....
Of course, it is technically possible to block all their servers, but then we probably won't be seeing much of you here then, either.
Understood...but it was odd i was unable to block them regardless.....no biggie...i'll try wildcarding the whole lot just to see....