Who can tell?
It's quite confusing.
When I check firefox add-ons I have something called Shockwave flash (v19.0 r0). So I don't actually know if this is shockwave or flash or something else? Adobe's website is no use whatsoever, it doesn't seem to explain the difference anywhere. I did manage to find a page that checked the version of the thing I have installed and confirmed it is the latest so I suppose that will have to do.