Can I use
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CSS Container Query Units

- WD

Container Query Units specify a length relative to the dimensions of a query container. The units include: cqw, cqh, cqi, cqb, cqmin, and cqmax.

Chrome

  1. ❌ 4 - 92: Not supported
  2. ❌ 93 - 100: Disabled by default
  3. ❌ 101 - 104: Disabled by default
  4. ✅ 105 - 137: Supported
  5. ✅ 138: Supported
  6. ✅ 139 - 141: Supported

Edge

  1. ❌ 12 - 104: Not supported
  2. ✅ 105 - 137: Supported
  3. ✅ 138: Supported

Safari

  1. ❌ 3.1 - 15.6: Not supported
  2. ✅ 16.0 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0 - TP: Supported

Firefox

  1. ❌ 2 - 109: Not supported
  2. ✅ 110 - 139: Supported
  3. ✅ 140: Supported
  4. ✅ 141 - 143: Supported

Opera

  1. ❌ 9 - 78: Not supported
  2. ❌ 79 - 90: Disabled by default
  3. ✅ 91 - 116: Supported
  4. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 138: Supported

Safari on iOS

  1. ❌ 3.2 - 15.8: Not supported
  2. ✅ 16.0 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0: Supported

Samsung Internet

  1. ❌ 4 - 19.0: Not supported
  2. ✅ 20 - 27: Supported
  3. ✅ 28: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

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

UC Browser for Android

  1. ❌ 15.5: Not supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ✅ 138: Supported

Firefox for Android

  1. ✅ 140: 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
CSS Tricks: Container Units Should Be Pretty Handy
Blog post: CSS Container Query Units