It's cookies and the change isn't really earth shattering but it does close the "redirection trick" loophole that some companies were using to track you across

It's cookies and the change isn't really earth shattering but it does close the "redirection trick" loophole that some companies were using to track you across domains. See my example here for more specific details: https://news.ycombinator.com/item?id=14493373 https://news.ycombinator.com/item?id=14493373