Very little "thermal" about it.
The article describes a device based on charge exchange.
P.S. Hey Del, if you're going to use FIreFox, you should try to stay up to date with the current versions, now at 1.0.4. It's an open source project and a continual experiment which can be both good and bad. There are documented exploits in older versions. I'm sure there are undocumented exploits in 1.0.4 but it's one of those bad solutions that are better than all the others. Annoying, but it's the price of vigilance.