I don't, but it seems to cache the fingerprint so a normal refresh doesn't regenerate. If I use their 'start over' control or just shift-refresh, I do get a dif

I don't, but it seems to cache the fingerprint so a normal refresh doesn't regenerate. If I use their 'start over' control or just shift-refresh, I do get a different fingerprint every time. Firefox, Ubuntu, and a handful of common plugins.