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

I don't think [isTypeSupported()](https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-istypesupported) increases the fingerprinting: the set of supported profiles is small and has few differences among OSes; it probably never changes among users. E.g. the [implementation status](https://github.com/yellowdoge/mediacapture-record-implementation-status/blob/master/chromium.md) shows which video codecs are implemented in Chrome per platform (there are just a few because Chrome must provide a software fallback in case any hardware-accelerated fail -- this also means that it's not possible for a user to identify those codecs that are hardware accelerated). A malicious site could perhaps infer the OS/platform but that information is already in the User Agent string.

Should this analysis be added to the text?

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Received on Friday, 23 February 2018 21:16:39 UTC