Comment 21 for bug 339772

(In reply to comment #16)
> Just a way of passing data from the
> application to the network layer.

The network layer needs not be involved here... I mean, in the end, this is all
just internal to the extension that implements all this; what does a protocol
handler gain you?

(well, if you decide you want one so that it can be used, things are different
of course (as opposed to "have to implement one to support bittorrent"))