Mozilla Software → [FireFox] Problem loading page(s)

Firefox can't find the server at www.dslreports.com.
Firefox can't find the server at www.google.ca.
Firefox can't find the server at www.youtube.com.

Anyone notice FF stops loading pages when surfing?
When I'm loading pages with many items like youtube videos when browsing many videos or photobucket when going though many pages of photos...it just stops loading like I have a dns issue but if I open IE it works fine.

whats going on?

Here is a example

»www.youtube.com/user/The ··· low=grid

At that page scroll to the bottom and press load more, repeat until you find a video from 2 years ago, or more if needed.
(I'd love to rant about Youtube on this horrible interface)

You should or might experience the server time-out.
Also after many searches of this nature, I notice Firefox start consuming 100% CPU also at times.

So far I tried disabling dns prefetch and I don't have the server time-outs but more the CPU going through the roof.

network.dns.disablePrefetch

***Happened again trying to edit this post.
I see no requests when I look on currports.
If I try favorite links, forefox doesn't try to make any connects, just 2 listening ports on the internal.
Firefox is dead in the water unless I close everything and lose any work.

Yes it's happened to me a few times over the last month.

Restarting FF solves the problem....................never looked into the reason.