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Make it clear that quota is not supposed to be a function of availabl… #108

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merged 2 commits into from Jul 8, 2020
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Make it clear that quota is not supposed to be a function of availabl… #108

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Quota is not supposed to be a function of available space
annevk Jul 6, 2020
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annevk Jul 7, 2020
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21 changes: 13 additions & 8 deletions storage.bs
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Expand Up @@ -478,14 +478,19 @@ rough estimate of the amount of bytes used by it.
deduplication, compression, and other techniques that obscure exactly how much bytes a
<a>storage shelf</a> uses.

<p>The <dfn export>storage quota</dfn> of a <a>storage shelf</a> is an <a>implementation-defined</a>
conservative estimate of the total amount of bytes it can hold. This amount should be less than the
total storage space on the device. It must not be a function of the available storage space on the
device.

<p class=note>User agents are strongly encouraged to consider navigation frequency, recency of
visits, bookmarking, and <a href="#persistence">permission</a> for {{"persistent-storage"}} when
determining quotas.
<p tracking-vector>The <dfn export>storage quota</dfn> of a <a>storage shelf</a> is an
<a>implementation-defined</a> conservative estimate of the total amount of bytes it can hold. This
amount should be less than the total storage space on the device. It must not be a function of the
available storage space on the device.

<div class=note>
<p>User agents are strongly encouraged to consider navigation frequency, recency of visits,
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Putting "strong encouragements" in non-normative notes instead of as "shoulds" is a bit weird.

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Well, these are suggestions. They are not really directly observable so it seems weird to require them.

bookmarking, and <a href="#persistence">permission</a> for {{"persistent-storage"}} when
determining quotas.

<p>Directly or indirectly revealing available storage space can lead to fingerprinting and leaking
information outside the scope of the <a for=/>origin</a> involved.
</div>



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