I have an Iphone by gift. I started deleting some cookies from Safari browser manually. It appears that some cookies from my other browsers are appearing in the same Safari cookie area as well, as if they are sharing a space to save cookies in common. I have noticed that sometimes as much as 24 hours later some cookies will reappear. It becomes rather obvious when you go to a Starbucks & manually delete cookies & haven't been back there. Suddenly you find Starbucks cookies back in your Safari cookie area. After some thought it occurred to me that this might be related to another browser saving or restoring webpages when I close it with webpages open. But I suspect that I am correct that some of my other mobile browsers may be sharing the Safari browser cache. For me, it's not such a big thing, simply a curiosity. And so I am wondering if someone here may know how such things work & if they might have some educational feedback. Like I said, perhaps I have already solved this mystery on my own?