Web features explorer - Navigation timing confidence

Web features explorer

The 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).

Browser support

Chrome 145 Released on 2026-02-10
Chrome Android 145 Released on 2026-02-10
Edge 145 Released on 2026-02-14
Firefox Not supported
Firefox for Android Not supported
Safari Not supported
Safari on iOS Not supported

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MDN documentation

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Specifications

Navigation Timing Level 2 (#sec-performance-timing-confidence), from Web Performance Working Group (W3C).

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