On Thu, May 14, 2015 at 3:59 PM, Devdatta Akhawe <dev.akh...@gmail.com>
wrote:
>
> 2. Add a `allow-unsandboxed-auxiliary` keyword to those supported by the
>> `sandbox` attribute, which, when present, would allow auxiliary browsing
>> contexts created by `window.open` and `target="_blank"` links to create
>> clean browsing contexts, unaffected by the sandbox which spawned them.
>>
>>
> Why isn't a child iframe of the sandboxed iframe an auxiliary browsing
> context?
>

Because it's a nested browsing context. Auxiliary browsing contexts are
related to a context, but not through nesting:
https://html.spec.whatwg.org/multipage/browsers.html#auxiliary-browsing-contexts.
It's just a definitional thing.

-mike

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Mike West <mk...@google.com>, @mikewest

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