Can I use
?

EOT - Embedded OpenType fonts

- UNOFF

Type of font that can be derived from a regular font, allowing small files and legal use of high-quality fonts. Usage is restricted by the file being tied to the website

Chrome

  1. ❌ 4 - 136: Not supported
  2. ❌ 137: Not supported
  3. ❌ 138 - 140: Not supported

Edge

  1. ❌ 12 - 136: Not supported
  2. ❌ 137: Not supported

Safari

  1. ❌ 3.1 - 18.4: Not supported
  2. ❌ 18.5: Not supported
  3. ❌ 26.0 - TP: Not supported

Firefox

  1. ❌ 2 - 138: Not supported
  2. ❌ 139: Not supported
  3. ❌ 140 - 142: Not supported

Opera

  1. ❌ 9 - 116: Not supported
  2. ❌ 117: Not supported

IE

  1. ❌ 5.5: Not supported
  2. ✅ 6 - 10: Supported
  3. ✅ 11: Supported

Chrome for Android

  1. ❌ 137: Not supported

Safari on iOS

  1. ❌ 3.2 - 18.4: Not supported
  2. ❌ 18.5: Not supported
  3. ❌ 26.0: Not supported

Samsung Internet

  1. ❌ 4 - 27: Not supported
  2. ❌ 28: 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. ❌ 137: Not supported

Firefox for Android

  1. ❌ 139: Not 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

Proposal by Microsoft, being considered for W3C standardization.

Resources:
Wikipedia
Example pages