Observed Signal · Jan 12, 2026 · Feature Release · Source: https://developer.chrome.com/static/blog/feed.xml · Impact: 4/5 · Sentiment: Positive
Chrome 143 Enhances FedCM for Better Privacy and Consistency
Chrome 143 introduces updates to the Federated Credential Management (FedCM) API to improve privacy, developer experience, and interoperability. Key changes include support for structured JSON objects in the ID assertion endpoint token, stricter validation requirements for IdP endpoints (including requiring accounts_endpoint and login_url in .well-known/web-identity), and API consistency/error-handling updates such as relocating the nonce into the params object and renaming IdentityCredentialError.code to IdentityCredentialError.error. Several changes are enforced in later versions (Chrome 145 for accounts_endpoint enforcement, nonce relocation, and the renamed error property). The post provides migration guidance for Chrome 143–144 compatibility, links to implementation guides and a FedCM demo, and invites feedback via the project's GitHub and developer newsletter.
Chrome (a major browser platform) is changing FedCM behavior and enforcing new validation and API semantics in upcoming versions. These changes affect identity flows for IdPs and RPs, with privacy and interoperability implications for identity infrastructure used across the adtech ecosystem.
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Key Takeaways & Evidence Grounding
- Chrome 143 adds support for structured JSON objects as the value of the token property in the FedCM ID assertion endpoint response.
- FedCM now strengthens validation for Identity Provider (IdP) endpoints; if using client_metadata, accounts_endpoint and login_url must be included in .well-known/web-identity.
- Chrome will enforce accounts_endpoint in the well-known file starting in Chrome 145.
- Chrome plans API consistency changes enforced in Chrome 145: nonce must be passed inside the params object and IdentityCredentialError.code is renamed to IdentityCredentialError.error; developers should check both properties during the Chrome 143–144 transition.
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Chrome modernizes web authentication with passkeys, EVP
At Google I/O 2026, the Chrome team published guidance and platform updates to modernize web authentication, emphasizing passkeys, federated sign-up, and browser-mediated verified attributes. Key technical features covered include the FedCM API for identity federation, the experimental Email Verification Protocol (EVP) for seamless verified email claims, the Digital Credentials API for selective disclosure from wallets, Immediate UI Mode (shipped in Chrome 149) and passkey autofill/conditional create for zero-friction enrollment, and Device Bound Session Credentials (DBSC) to tie sessions to hardware (experimental on Windows). The post describes patterns (e.g., "federate-then-upgrade"), cross-platform credential sharing (Digital Asset Links and Related Origin Requests), and recovery strategies, and cites case studies (pixiv, adidas) showing improved login success and passkey adoption.
Chrome 145 Beta: Major Upgrades for Web Developers!
Google published the Chrome 145 beta on January 14, 2026, delivering a broad set of web-platform, UI/CSS, privacy and measurement updates across Android, ChromeOS, Linux, macOS and Windows. Notable additions include the Origin API, Device Bound Session Credentials (DBSC), cookie-store maxAge, new performance timing fields (paintTime, presentationTime) and changes to the LayoutShift API to report in CSS pixels. Chrome 145 also splits Local Network Access permissions, exposes additional animation events, refines rendering of high border-radius elements, adds column-wrap support for multi-column layouts, and requires sticky activation for clipboardchange. As part of privacy work, Chrome will remove the UserAgentReduction policy so reduced User-Agent strings are sent by default and sites are encouraged to use User-Agent Client Hints (UA-CH). The release includes deprecations such as removal of obsolete macOS virtual camera support.
Chrome 145 Enhances Security and Developer Tools
Chrome 145, published February 10, 2026, is rolling out with developer-facing features including CSS multicol column wrapping, a new Origin API, and Device Bound Session Credentials (DBSC). The multicol update adds column-wrap and column-height from the multi-column layout level two spec to allow columns to wrap vertically instead of creating inline overflow. The Origin API exposes an Origin object for safer comparison, serialization and parsing of web origins. DBSC lets sites bind sessions to a specific device using short‑lived cookies plus a hardware‑backed key pair, with the browser proving possession of the private key to refresh session cookies. The blog post links to full Chrome 145 release notes and related DevTools and ChromeStatus pages for additional changes.
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