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

• Features only in:
• Chromium
• Firefox
• Safari

• Browser releases:
• Chrome 146
• Chrome Android 146
• Edge 146
• Firefox 149
• Firefox for Android 149
• Safari 26.4
• Safari on iOS 26.4

New features in Chrome 146 (released on 2026-03-10)

• Iterator.concat()

  Baseline Newly Available (since 2026-03-24)

  The Iterator.concat() JavaScript method returns an iterator that yields values from a sequence of iterators, exhausting each iterator before moving on to the next.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 147 Released on 2026-01-13
  • Firefox for Android 147 Released on 2026-01-13
  • Safari 26.4 Released on 2026-03-24
  • Safari on iOS 26.4 Released on 2026-03-24

• Navigation precommit handlers

  Limited availability

  The precommitHandler callback option to NavigateEvent's intercept() method returns a promise that defers navigation until the promise resolves. You can use this to change the navigation's URL, state, and history before navigation occurs.

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

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 148 Released on 2026-02-24
  • Firefox for Android 148 Released on 2026-02-24
  • Safari ❌
  • Safari on iOS ❌

• Scoped custom element registries

  Limited availability

  The CustomElementRegistry() constructor creates a new custom element registry that's separate from the global window.customElements registry. Creating more than one registry is useful for multiple custom elements that have the same tag name to coexist.

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

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

• text-indent: each-line

  Baseline Newly Available (since 2026-03-13)

  The text-indent: each-line CSS declaration indents text after forced breaks as well as to the first line of a block.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 121 Released on 2023-12-19
  • Firefox for Android 121 Released on 2023-12-19
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• text-indent: hanging

  Baseline Newly Available (since 2026-03-13)

  The text-indent: hanging CSS declaration indents all lines except the first.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 121 Released on 2023-12-19
  • Firefox for Android 121 Released on 2023-12-19
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20