Navigation timing confidenceThe confidence property of a navigation timing entry describes whether the navigation metric is likely to be representative the page's performance (high confidence) or affected by transient conditions, such as browser startup (low confidence).limitedhttps://w3c.github.io/navigation-timing/#sec-performance-timing-confidencehttps://developer.mozilla.org/docs/Web/API/PerformanceTimingConfidenceapi.PerformanceNavigationTiming.confidenceapi.PerformanceTimingConfidenceapi.PerformanceTimingConfidence.randomizedTriggerRateapi.PerformanceTimingConfidence.toJSONapi.PerformanceTimingConfidence.valuehttps://nowyoucanuse.com/features--navigation-timing-confidence.html