Can I use
?

PNG favicons

- LS

Icon used by browsers to identify a webpage or site. While all browsers support the .ico format, the PNG format can be preferable.

Chrome

  1. 4 - 112: Supported
  2. 113: Supported
  3. 114 - 116: Supported

Edge

  1. 12 - 112: Supported
  2. 113: Supported

Safari

  1. 3.1 - 16.4: Supported
  2. 16.5: Supported
  3. 16.6 - TP: Supported

Firefox

  1. 2 - 112: Supported
  2. 113: Supported
  3. 114 - 115: Supported

Opera

  1. 9 - 98: Supported
  2. 99: Supported

IE

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

Chrome for Android

  1. 113: Supported

Safari on iOS

  1. 3.2 - 11.4: Not supported
  2. 12 - 16.4: Supported
  3. 16.5: Supported

Samsung Internet

  1. 4 - 20: Supported
  2. 21: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

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

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 113: Supported

Firefox for Android

  1. 113: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported

Favicon support is a complicated topic. See this guide for more information.

See also SVG favicons.

Resources:
How to favicon in 2021