New features in Firefox 159 (released on 2026-10-27)

• EXT_texture_norm16 WebGL extension

  Newly Available (since 2026-10-27)

  The EXT_texture_norm16 extension to WebGL 2.0 contexts adds 16 bit signed normalized and unsigned normalized fixed-point texture, renderbuffer, and texture buffer formats.

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  • Chrome 87 Released on 2020-11-17
  • Chrome Android 87 Released on 2020-11-17
  • Edge 87 Released on 2020-11-19
  • Firefox 159 Released on 2026-10-27
  • Firefox for Android 159 Released on 2026-10-27
  • Safari 16 Released on 2022-09-12
  • Safari on iOS 16 Released on 2022-09-12

• Scoped custom element registries

  Newly Available (since 2026-10-27)

  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.

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  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 159 Released on 2026-10-27
  • Firefox for Android 159 Released on 2026-10-27
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

• Scroll-driven animations

  Newly Available (since 2026-10-27)

  The animation-timeline, scroll-timeline, and view-timeline CSS properties advance animations based on the user's scroll position.

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  • Chrome 115 Released on 2023-07-18
  • Chrome Android 115 Released on 2023-07-21
  • Edge 115 Released on 2023-07-21
  • Firefox 159 Released on 2026-10-27
  • Firefox for Android 159 Released on 2026-10-27
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15