Web features explorer - Early data

Web features explorer

TLS 1.3 sessions may be resumed more quickly by sending so-called early data to servers before the TLS handshake has finished. Also known as zero round-trip time resumption or 0-RTT.

Browser support

Chrome Not supported Bugs: 789599 41272059
Chrome Android Not supported Bugs: 41272059
Edge Not supported Bugs: 41272059
Firefox 58 Released on 2018-01-23
Firefox for Android 58 Released on 2018-01-22
Safari Not supported
Safari on iOS Not supported

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MDN documentation

Specifications

Using Early Data in HTTP, from HTTP Working Group (IETF).

Web Platform Tests (WPT)

View the latest WPT test results for this feature

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist