That page works fine here, using the Firefox 24 beta. Normally I have Flash deactivated, and activate it when I need it. I also have a profile with NoScript and Flash activated, but NoScript is a pain because I always have to permit more things to view a page.
With Flash activated, the page reloads just fine. No freeze or anything.
I can watch YouTube videos for a while, but evenutally the machine runs out of something and I need to reboot. My on-line banking depends on Flash, and that is working also. Our Flash is not perfect, but Flash is on its way out anyway, so I'm not that concerned.
An update to the latest Flash would be nice, even so.