[failfailfail]

Fail fail fail Safari doesn't support navigation timing api, you are not comparing apples with apples, just showing off the failings in your analytics provider.

[millstone]

The navigation timing API seems to work in Safari 8 (Yosemite).

[skavish]

hmm, it seems to work just fine. why do you think it is not supported?

[skavish]

safari 8 supports it: http://caniuse.com/#feat=nav-timing