A web page consumes a constant 25% of the CPU - after it has loaded

I am a huge fan of Process Explorer, a free Windows program from Mark Russinovich of Microsoft. It exposes a ton of technical information about what a Windows computer is doing behind the scenes, and it runs on every Windows computer I touch. I blogged about Process Explorer back in 2010 and not much has changed since then. It is invaluable.

I bring this up because it recently alerted me to a high CPU usage condition.