Comment 1 for bug 473677

Created attachment 273236
testcase

Bug 365772 is a bit related.
When cookies are denied, then storage is throwing errors when trying to access it, while document.cookie just returns an empty string.

http://www.whatwg.org/specs/web-apps/current-work/#security5
"
Treating persistent storage as cookies: user agents may present the persistent storage feature to the user in a way that does not distinguish it from HTTP session cookies. [RFC2965]
"
You could read that as "storage functions should not throw security errrors when cookie functions aren't doing it either", I guess. Although I suspect that part is more talking about the UI or something.