Background Sync API

- UNOFF

Provides one-off and periodic synchronization for Service Workers with an onsync event.

Chrome

  1. 4 - 48: Not supported
  2. 49 - 123: Supported
  3. 124: Supported
  4. 125 - 127: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 122: Supported
  3. 123: Supported

Safari

  1. 3.1 - 17.3: Not supported
  2. 17.4: Not supported
  3. 17.5 - TP: Not supported

Firefox

  1. 2 - 124: Not supported
  2. 125: Not supported
  3. 126 - 128: Support unknown

Opera

  1. 9 - 41: Not supported
  2. 42 - 108: Supported
  3. 109: Supported

IE

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

Chrome for Android

  1. 123: 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: Not supported
  2. 5 - 23: Supported
  3. 24: 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. 123: Supported

Firefox for Android

  1. 124: Not supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
Firefox support bug
SyncManager on MDN Web Docs
Google Developers blog: Introducing Background Sync