That part appears to be fixed for me. With my non tweaked (as above) Firefox 29 PC on Windows 7, I don't see the cdn.cruisersforum.com message anymore. However the site is still slow. It takes about 10 seconds or more for every page.
I have identified the main part where the delay now happens. Firefox displays it's progress at the foot of the page. When a link is clicked, a few messages fly past, and then it displays "Waiting on www.cruisersforum.com" which stays there for 6 or 7 seconds. Then another few messages fly past too quickly to read and the page is loaded.
I hope this will point someone in the right direction to identify the cause.
Note. I am using mobile broadband
which is a bit slow, but CF is still slower than just about any site I access.