Update WebAuthn PRF support for Safari 18.0+ #27586
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Elchi3
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Aug 15, 2025
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Thanks for your PR and welcome to mdn-browser-compat-data! 🎉
Great research! 18 seems correct to me. I guess Windows support is missing here, though, so maybe that's why the bug is still open? We usually set partial implementation when we encounter operating system limitations.
Co-authored-by: Florian Scholz <[email protected]>
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Reference: https://developer.apple.com/documentation/safari-release-notes/safari-18-release-notes
Summary
Marks the
prfextension for the CredentialsContainers API as available in Safari for macOS and iOS as of Safari 18.Test results and supporting details
This feature is cited in the Safari 18.0 Release Notes:
I've tested it with this gist on Safari 18.6 running on macOS, and Safari 18.6 running on iOS (unfortunately I have no access to earlier versions). Both versions worked as expected when tested both with Apple's own password manager and with a third-party password manager (1Password).
The WebKit source has a feature gate referencing the iOS and macOS versions of Safari in which it was made available.
Confusingly, the WebKit bug 259934 that is currently referenced in this definition remains open with no updates from Apple. However, the feature is present, definitely works, and has been publicly announced by Apple in their own changelog 11 months ago. And the bug in the WebKit tracker has not been updated by Apple since 2023. So my assumption is that they forgot to close it :)
Related issues
None as far as I can tell.