Limited Availability

Early data

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.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on May 9, 2018.

Desktop Browser Engine Support

Google Chrome

—

Unsupported

Mozilla Firefox

60

Supported

Apple Safari

—

Unsupported

Microsoft Edge

—

Unsupported

Mobile Browser Engine Support

Chrome Android

—

Firefox Android

60

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

http.status.425 ↗