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 - 119: Disabled by default
  3. 120: Disabled by default
  4. 121 - 123: Disabled by default

Edge

  1. 12 - 117: Not supported
  2. 118 - 119: Disabled by default
  3. 120: Disabled by default

Safari

  1. 3.1 - 17.0: Not supported
  2. 17.1: Not supported
  3. 17.2 - TP: Not supported

Firefox

  1. 2 - 119: Not supported
  2. 120: Not supported
  3. 121 - 123: Not supported

Opera

  1. 9 - 103: Not supported
  2. 104: Not supported

IE

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

Chrome for Android

  1. 119: Not supported

Safari on iOS

  1. 3.2 - 17.0: Not supported
  2. 17.1: Not supported
  3. 17.2: Not supported

Samsung Internet

  1. 4 - 22: Not supported
  2. 23: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Not supported

UC Browser for Android

  1. 15.5: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 119: Not supported

Firefox for Android

  1. 119: Not supported

QQ Browser

  1. 13.1: Not supported

Baidu Browser

  1. 13.18: Not supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
Firefox support bug
Wikipedia article
Official Zstandard site
Support test