Well, turns out it won't work with Safari but will under Firefox.

I don't think the data is even close to being reliable however. It is telling me that in my 90 minutes ride this morning I climbed a total of 13,238 metres. For those of you who may not be metric literate, that is just over 43,000 feet!

It is also calculating distance at just less than half of what my cateye computer says.

I think it needs work.