Can I use
?

zstd (Zstandard) content-encoding

- OTHER

Data compression method providing faster page loading while using less CPU power on the server.

Chrome

  1. ❌ 4 - 117: Not supported
  2. ❌ 118 - 122: Disabled by default
  3. ✅ 123 - 145: Supported
  4. ✅ 146: Supported
  5. ✅ 147 - 149: Supported

Edge

  1. ❌ 12 - 117: Not supported
  2. ❌ 118 - 122: Disabled by default
  3. ✅ 123 - 144: Supported
  4. ✅ 145: Supported

Safari

  1. ❌ 3.1 - 18.7: Not supported
  2. ◐ 26.0 - 26.2: Partial support
  3. ◐ 26.3: Partial support
  4. ◐ 26.4 - TP: Partial support

Firefox

  1. ❌ 2 - 125: Not supported
  2. ✅ 126 - 147: Supported
  3. ✅ 148: Supported
  4. ✅ 149 - 151: Supported

Opera

  1. ❌ 9 - 108: Not supported
  2. ✅ 109 - 126: Supported
  3. ✅ 127: Supported

IE

  1. ❌ 5.5 - 10: Not supported
  2. ❌ 11: Not supported

Chrome for Android

  1. ✅ 145: Supported

Safari on iOS

  1. ❌ 3.2 - 18.7: Not supported
  2. ◐ 26.0 - 26.2: Partial support
  3. ✅ 26.3: Supported
  4. ✅ 26.4: Supported

Samsung Internet

  1. ❌ 4 - 28: Not supported
  2. ❌ 29: Not supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12.1: Not supported
  2. ❌ 80: Not supported

UC Browser for Android

  1. ❌ 15.5: Not supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ✅ 145: Supported

Firefox for Android

  1. ✅ 147: Supported

QQ Browser

  1. ❌ 14.9: Not supported

Baidu Browser

  1. ❌ 13.52: Not supported

KaiOS Browser

  1. ❌ 2.5: Not supported
  2. ❌ 3: Not supported
Resources:
Firefox support bug
MDN Glossary entry on Zstandard compression
Wikipedia article
Official Zstandard site
WebKit position on zstd
Support test