Can I use
?

Service Workers

- CR

Method that enables applications to take advantage of persistent background processing, including hooks to enable bootstrapping of web applications while offline.

Chrome

  1. ❌ 4 - 39: Not supported
  2. ◐ 40 - 44: Partial support
  3. ✅ 45 - 137: Supported
  4. ✅ 138: Supported
  5. ✅ 139 - 141: Supported

Edge

  1. ❌ 12 - 14: Not supported
  2. ❌ 15 - 16: Disabled by default
  3. ✅ 17 - 137: Supported
  4. ✅ 138: Supported

Safari

  1. ❌ 3.1 - 11: Not supported
  2. ✅ 11.1 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0 - TP: Supported

Firefox

  1. ❌ 2 - 32: Not supported
  2. ❌ 33 - 43: Disabled by default
  3. ✅ 44: Supported
  4. ✅ 45: Supported
  5. ✅ 46 - 51: Supported
  6. ✅ 52: Supported
  7. ✅ 53 - 59: Supported
  8. ✅ 60: Supported
  9. ✅ 61 - 67: Supported
  10. ✅ 68: Supported
  11. ✅ 69 - 139: Supported
  12. ✅ 140: Supported
  13. ✅ 141 - 143: Supported

Opera

  1. ❌ 9 - 26: Not supported
  2. ◐ 27 - 31: Partial support
  3. ✅ 32 - 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 - 11.2: Not supported
  2. ✅ 11.3 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0: Supported

Samsung Internet

  1. ✅ 4 - 27: Supported
  2. ✅ 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: Supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ◐ 138: Partial support

Firefox for Android

  1. ✅ 140: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ❌ 2.5: Not supported
  2. ✅ 3: Supported

Details on partial support can be found on is ServiceWorker Ready?

Resources:
MDN Web Docs - Service Workers
List of various resources
HTML5Rocks article (introduction)