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 - 135: Supported
  4. ✅ 136: Supported
  5. ✅ 137 - 139: Supported

Edge

  1. ❌ 12 - 117: Not supported
  2. ❌ 118 - 122: Disabled by default
  3. ✅ 123 - 135: Supported
  4. ✅ 136: Supported

Safari

  1. ❌ 3.1 - 18.4: Not supported
  2. ❌ 18.5: Not supported
  3. ❌ TP: Not supported

Firefox

  1. ❌ 2 - 125: Not supported
  2. ✅ 126 - 137: Supported
  3. ✅ 138: Supported
  4. ✅ 139 - 141: Supported

Opera

  1. ❌ 9 - 108: Not supported
  2. ✅ 109 - 116: Supported
  3. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 136: Supported

Safari on iOS

  1. ❌ 3.2 - 18.4: Not supported
  2. ❌ 18.5: Not supported

Samsung Internet

  1. ❌ 4 - 26: Not supported
  2. ❌ 27: 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. ✅ 136: Supported

Firefox for Android

  1. ✅ 137: 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
Wikipedia article
Official Zstandard site
WebKit position on zstd
Support test