2.1.2 [WEBSTG] Section 4.2, The sessionStorage attribute


The specification states:

 Each top-level browsing context has a unique set of session storage areas, one for each origin.

IE8 Mode (All Versions)

http and https are treated as the same scheme for origin checks. Port is not considered.


The specification states:

 When a new top-level browsing context is created by cloning an existing browsing context, the new browsing context must start with the same session storage areas as the original, but the two sets must from that point on be considered separate, not affecting each other in any way.

IE8 Mode, IE9 Mode, IE10 Mode, IE11 Mode, and EdgeHTML Mode (All Versions)

Duplicating a tab does not copy the storage.