secure browser

Hello there,
One of these days i stumbled on one article http://www.scmagazineus.com/Browser-wars/article/100426/
It is about browser wars Fx vs.IE
At the foot of this article there is a subtitle about so called "zero-footprint" browser that seems to provide enhanced security in
web surfing rather then Fx and IE
Its called e-Capsule Private Browser
I have found info about one in wiki http://en.wikipedia.org/wiki/Private_Browser
I m wondering whether it is worth using this stuff or stick with proven Fx and IE
Whats your opinion