Can I use
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::selection CSS pseudo-element

- WD

The ::selection CSS pseudo-element applies rules to the portion of a document that has been highlighted (e.g., selected with the mouse or another pointing device) by the user.

Chrome

  1. 4 - 123: Supported
  2. 124: Supported
  3. 125 - 127: Supported

Edge

  1. 12 - 123: Supported
  2. 124: Supported

Safari

  1. 3.1 - 17.3: Supported
  2. 17.4: Supported
  3. 17.5 - TP: Supported

Firefox

  1. 2 - 61: Supported
  2. 62 - 124: Supported
  3. 125: Supported
  4. 126 - 128: Supported

Opera

  1. 9: Not supported
  2. 9.5 - 108: Supported
  3. 109: Supported

IE

  1. 5.5 - 8: Not supported
  2. 9 - 10: Supported
  3. 11: Supported

Chrome for Android

  1. 124: Supported

Safari on iOS

  1. 3.2 - 17.3: Not supported
  2. 17.4: Not supported
  3. 17.5: Not supported

Samsung Internet

  1. 4 - 23: Supported
  2. 24: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 11.1: Support unknown
  2. 11.5 - 12.1: Supported
  3. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 124: Supported

Firefox for Android

  1. 125: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
MDN web docs
::selection test