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Chrome 51 Beta: Credential Management API and reducing the overhead of offscreen rendering


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Unless otherwise noted, changes described below apply to the newest Chrome Beta channel release for Android, Chrome OS, Linux, Mac, and Windows.

Credential Management API

Many sites allow their users to sign in to receive personalized content. Today that requires remembering and typing credentials, which lowers account security when users reuse passwords across multiple sites. Modern browsers have credential managers that remember and autofill saved passwords, but these managers cannot account for custom login flows or remember federated identity preferences.


The latest version of Chrome now supports the Credential Management API, allowing sites to interact with the browser’s credential manager to improve the login experience for users. The API enables users to sign in with one tap and lets them automatically sign back in when returning to the site.
Signing in with one tap using the Credential Management API

Reducing the overhead of offscreen rendering

Modern websites commonly embed cross-origin content like videos, social widgets, and ads. Embedding these resources allows sites to offer compelling content experiences, but it also creates a lot of overhead that can jank the page in ways the embedding site can’t control. The latest version of Chrome no longer runs the rendering pipeline or requestAnimationFrame() callbacks for cross-origin frames that are offscreen. This eliminates unnecessary work and reduces power consumption by up to 30% on several popular mobile sites without affecting the user experience.

Additional features in this release

Other changes

  • The ability to customize the message shown in the onbeforeunload() dialog has been removed to protect users from malicious websites and align with other browsers.
  • Chrome on Android now uses the same media pipeline as desktop Chrome, improving  WebAudio support and allowing sites to interact with the playback rate on <audio> and <video> tags.
  • The latest version of Chrome improves web animations interoperability by supporting lists of values and removing dashed-names in keyframes.
  • Chrome now requires a border style to paint border images, improving spec compliance and interoperability.
  • Percentages can now be used for the sizes of flex item children.
  • DHE-based ciphers have been deprecated and will be removed in Chrome 52 in favor of ECDHE ciphers to improve TLS security.
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