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• Latest browser releases:
• Chrome 133
• Chrome Android 133
• Edge 133
• Firefox 135
• Firefox for Android 135
• Safari 18.3
• Safari on iOS 18.3

New features in Chrome 133 (released on 2025-02-04)

• Atomics.pause()

  Limited availability

  Tags: javascript

  The Atomics.pause() static method gives a hint to the CPU that the code calling the method is in a short-duration wait for shared memory, known as spinning or a spinlock.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Attribution reporting

  Limited availability

  Tags: api html http

  The Attribution Reporting API measures when an ad click or view leads to a conversion, such as a purchase on an advertiser site.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position (concerns: interoperability, venue)
  • Safari on iOS ❌ Vendor position (concerns: interoperability, venue)

• Container scroll-state queries

  Limited availability

  Tags: css Groups: CSS > Container queries

  Container scroll-state queries with the @container scroll-state(...) at-rule apply styles to an element based on the sticky positioning, snapped, and scrollable state of the container.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• popover="hint"

  Limited availability

  Tags: api html Groups: HTML

  The popover="hint" global HTML attribute creates a popover that is subordinate to popovers with a popover="auto" attribute. You can use this to create tooltips that don't dismiss auto popovers.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• text-box

  Limited availability

  Tags: css Groups: CSS > Text

  The text-box CSS property sets the spacing above and below text based on a font's typographic features. For example, text-box: trim-both ex alphabetic trims the top to the top of the letter x and the bottom to the bottom of most letters, without descenders.

  Baseline availability blocked since February 2025 by Firefox (0 months)

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• Memory64 (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

  Instructions accept 64-bit memory indexes.

  Baseline availability blocked since February 2025 by Safari (0 months)

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox 134 Released on 2025-01-07
  • Firefox for Android 134 Released on 2025-01-07
  • Safari ❌
  • Safari on iOS ❌