[ficklepickle]

It certainly defied my expectations. Chrome is the same. All I can think is that they wanted an inprivate window's tabs to share a jar and that then gets kinda complicated with popping tabs into their own window, putting them back, flicking between those accidentally while dragging a tab, etc.

Looking at the docs it appears that Safari gets around this by just having a separate jar per tab? On desktop at least, mobile appears to be shared.

[nuker]

Just checked mobile Safari, looks not shared. Open private tab, login to Amazon. Open another private tab, go to Amazon - not signed in.