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• Features only in:
• Chromium
• Firefox
• Safari

• Browser releases:
• Chrome 145
• Chrome Android 145
• Edge 145
• Firefox 148
• Firefox for Android 148
• Safari 26.3
• Safari on iOS 26.3

New features in Safari 26.3 (released on 2026-02-11)

• Zstandard compression

  Baseline Newly Available (since 2026-02-11)

  Zstandard or zstd is a fast lossless compression algorithm. When used as a content encoding, it is often faster and offers better compression than brotli.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox 126 Released on 2024-05-14
  • Firefox for Android 126 Released on 2024-05-14
  • Safari 26.3 Released on 2026-02-11
  • Safari on iOS 26.3 Released on 2026-02-11