Firefox Better Than IE For Foxsoccer.tv

I was just watching the replay of Tottenham v. West Brom on foxsoccer.tv on my aged HP nc8230 laptop. In IE, the thing was pegging the processor at 100% regularly, with an average load of about 95%. In Firefox, it hit 100% once in a while, but avergaed about 82% processor load. In IE, the video was jerky and unwatchable, in Firefox, it stalled only once in a while. Nothing else was running.