• 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 Firefox 151 (released on 2026-05-19)

• Container style queries

  Baseline Newly Available (since 2026-05-19)

  Container style queries with the @container at-rule apply styles to an element based on the values of custom properties of its container.

  Learn more

  • Chrome 111 Released on 2023-03-07
  • Chrome Android 111 Released on 2023-03-07
  • Edge 111 Released on 2023-03-13
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android 151 Released on 2026-05-19
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

• Document picture-in-picture

  Limited availability

  The document picture-in-picture API creates an always-on-top window from arbitrary HTML content.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android ❌
  • Edge 130 Released on 2024-10-17
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android ❌ Vendor position : positive (concerns: device independence)
  • Safari ❌ Vendor position : unknown (concerns: usability, portability, annoyance, device independence)
  • Safari on iOS ❌ Vendor position : unknown (concerns: usability, portability, annoyance, device independence)

• Web serial

  Limited availability

  The navigator.serial API communicates with devices over serial ports, such as microcontrollers.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android ❌
  • Edge 89 Released on 2021-03-04
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android ❌ Vendor position : neutral
  • Safari ❌ Vendor position : oppose (concerns: privacy, security, use cases, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: privacy, security, use cases, device independence)