Web Storage: provide a recommendation for behavior in private/incognito modes

[dvoytenko]

Some non-normative text could give a recommendation for how storage APIs should behave in private or incognito modes.

[domenic]

@mnot did you ever end up writing an "incognito mode" spec?

[mnot]

Sort of. What we observed was that browsers regularly innovate in this space, and we didn't want to limit that (or worse, get out of sync with them).

I've got a straw-man spec that talks about "User Data Controls" --
https://gist.github.com/mnot/96440a5ca74fcf328d23
... that we've talked about at the TAG a bit.

I'd love feedback / suggestions / criticism; especially as to whether having something like that would help in situations like this.

[dvoytenko]

@domenic @mnot This sounds great. For posterity, I filed this bug a while ago against Safari/WebKit: https://bugs.webkit.org/show_bug.cgi?id=157010