• 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 151
• Firefox for Android 151
• Safari 26.5
• Safari on iOS 26.5

New features in Safari on iOS 26.5 (released on 2026-05-11)

• Hanging punctuation

  Limited availability

  The hanging-punctuation CSS property puts punctuation characters outside of the box to align the text with the rest of the document.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11

• :open

  Baseline Newly Available (since 2026-05-11)

  The :open CSS pseudo-class matches elements that have open states, like <details>, <dialog>, or <select>, based on their state.

  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 136 Released on 2025-03-04
  • Firefox for Android 136 Released on 2025-03-04
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11

• Origin

  Limited availability

  An Origin object represents an origin, as in a scheme, hostname, and port. You can use it to make same-site and same-origin comparisons.

  Baseline availability blocked since May 2026 by Firefox (1 months)

  Learn more

  • Chrome 145 Released on 2026-02-10
  • Chrome Android 145 Released on 2026-02-10
  • Edge 145 Released on 2026-02-14
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11

• ToggleEvent source

  Baseline Newly Available (since 2026-05-11)

  The source property of a ToggleEvent object is the element which triggered the toggle event to fire for a popover, <dialog>, or <details> element, if applicable.

  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 145 Released on 2025-11-11
  • Firefox for Android 145 Released on 2025-11-11
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11