FedCM: Support Credential Management Mediation Requirements for Auto Re-authentication

Category: Miscellaneous
Type: No developer-visible change
Status: Enabled by default (Chrome 115)
Intent stage: None

Breaking change: No
Enterprise impact: Medium
Chromium flag: #fedcm-auto-re-authn
Spec maturity: Incubation
Web Platform Tests: Yes

WPT details: http://third_party/blink/web_tests/external/wpt/credential-management/fedcm-network-requests.https.html we’re still working on making tests behave as intended on WPT.fyi

Summary

Supports "mediation requirements" to provide streamlined re-authentication UX for users who have created federated accounts on websites with FedCM API.

Standards & signals

Specification: https://w3c.github.io/webappsec-credential-management/#enumdef-credentialmediationrequirement
Firefox: Positive — We have been actively working with Firefox to standardize this API. In general we are aligned on the feature itself. e.g. auto re-authentication can provide streamlined UX without reducing privacy. The current API shape matches with what Firefox has in mind and we will work out more details: https://github.com/fedidcg/FedCM/issues/429#issuecomment-1426162273
Safari: Closed Without a Position — No signal for “auto re-authn” yet. Positive for the general FedCM API.
Web developers: No signals
Tracking bug: https://crbug.com/1304404

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=fedcm-support-credential-management-mediation-requirements-for-auto-re-authentication
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+FedCM%3A%20Support%20Credential%20Management%20Mediation%20Requirements%20for%20Auto%20Re-authentication
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=FedCM%3A%20Support%20Credential%20Management%20Mediation%20Requirements%20for%20Auto%20Re-authentication
Baseline status: https://webstatus.dev/?q=FedCM%3A%20Support%20Credential%20Management%20Mediation%20Requirements%20for%20Auto%20Re-authentication

Docs: https://github.com/fedidcg/FedCM/issues/429

Samples: https://webid-fcm.glitch.me/

View on chromestatus.com