Can I use
?

Push API

- WD

API to allow messages to be pushed from a server to a browser, even when the site isn't focused or even open in the browser.

IE

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

Edge

  1. 12 - 16: Not supported
  2. 17 - 18: Supported
  3. 79 - 85: Supported
  4. 86: Supported

Firefox

  1. 2 - 43: Not supported
  2. 44: Supported
  3. 45: Supported
  4. 46 - 51: Supported
  5. 52: Supported
  6. 53 - 59: Supported
  7. 60: Supported
  8. 61 - 80: Supported
  9. 81: Supported
  10. 82 - 83: Supported

Chrome

  1. 4 - 43: Not supported
  2. 44 - 49: Partial support
  3. 50 - 85: Supported
  4. 86: Supported
  5. 87 - 89: Supported

Safari

  1. 3.1 - 9: Not supported
  2. 9.1 - 13.1: Not supported
  3. 14: Not supported
  4. TP: Not supported

Opera

  1. 9 - 36: Not supported
  2. 37 - 41: Support unknown
  3. 42 - 70: Supported
  4. 71: Supported

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Not supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Supported

Chrome for Android

  1. 85: Supported

Firefox for Android

  1. 79: Supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 11.2: Supported
  2. 12.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Supported
Resources:
MDN Web Docs - Push API
Google Developers article