Re: [mediacapture-record] Fingerprint surface coming from 'isTypeSupported' - needs consideration?

If the data returned by `isTypeSupported` won't vary between implementations, or there's some assurance that a particular OS/UA implementation won't have variations inside of it, then that would affect the fingerprintability and I do think that's worth documenting in the specification.

The implementation status page you point to specifically notes that the supported values currently differ based on the chipset (ARM or Intel) in Chrome and link to bugs that suggest that the values will differ based on the particular chipset (chipsets that support VP9). Am I reading those tables/bugs correctly? That may be feature detection that's intended for this functionality, but I think we should not claim that there is no variation or information disclosure if that variation is present or planned.

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Received on Monday, 26 March 2018 19:23:43 UTC