Re: [w3ctag/design-reviews] systemEntropy addition to PerformanceNavigationTiming (Issue #878)

Hi Tag - 

We've iterated on the design of this API in the WebPerfWG. The explainer, and Chrome status entry pages have all been updated. Updated details are captured in the explainer, but the high-level summary is that the field has been renamed to 'confidence', and noise via a randomized response algorithm has been introduced to reduce fingerprinting risks. 

The explainer also gives an example of how a RUM provider might debias the aggregate data. 

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