• Filters:
• Newly available
• Widely available
• Limited availability
• One missing engine
• Discouraged
• Opposed
• All features

• Features only in:
• Chromium
• Firefox
• Safari

• Browser releases:
• Chrome 148
• Chrome Android 148
• Edge 148
• Firefox 150
• Firefox for Android 150
• Safari 26.4
• Safari on iOS 26.4

New features in Firefox 150 (released on 2026-04-21)

• ariaNotify()

  Limited availability

  The ariaNotify() method of Element and Document requests assistive technology software, if activated, to announce a message to the user. This can help make dynamic content changes more accessible to users.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari ❌ Vendor position : support (concerns: internationalization, portability, annoyance)
  • Safari on iOS ❌ Vendor position : support (concerns: internationalization, portability, annoyance)

• Custom highlights from point

  Limited availability

  The CSS.highlights.highlightsFromPoint() method returns an array of Highlight objects at a specified point.

  Baseline availability blocked since April 2026 by Safari (1 months)

  Learn more

  • Chrome 140 Released on 2025-09-02
  • Chrome Android 140 Released on 2025-09-02
  • Edge 140 Released on 2025-09-05
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari ❌
  • Safari on iOS ❌

• light-dark() image values

  Limited availability

  The light-dark() CSS function accepts, in addition to colors, two <image> values, such as a gradient or URL, and uses one depending on the current color scheme.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari ❌
  • Safari on iOS ❌

• Media element pseudo-classes

  Limited availability

  The :playing, :paused, :seeking, :buffering, :stalled, :muted, and :volume-locked CSS pseudo-classes match <audio> and <video> elements based on their state.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• overscroll-behavior

  Limited availability

  The overscroll-behavior CSS property disables default scrolling behaviors when the edges of a scrolling area are reached.

  Baseline availability blocked since April 2026 by Safari (1 months)

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari ❌
  • Safari on iOS ❌

• <img sizes="auto" loading="lazy">

  Limited availability

  The sizes="auto" attribute for the <img> HTML element sets the layout size for the image based on the computed layout size when choosing a source from the srcset. This attribute only applies to images with the loading="lazy" attribute.

  Baseline availability blocked since April 2026 by Safari (1 months)

  Learn more

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari ❌
  • Safari on iOS ❌