On Mon, Aug 18, 2014 at 1:51 PM, Ilya Grigorik <igrigo...@google.com> wrote:
> Yes, until there is a bug and some UA omits it by accident (or > intentionally), at which point I'm back to UA detection: if X UA then no > delay, if Y UA then I don't trust the timestamp... at which point, I guess > I would need to move that detection into JS-land and pick the method that I > trust. > Firefox appears to already ship sendBeacon without the Beacon-Age header anyway. (I imagine their implementation predates the header.)