CSS Containment

- REC

The CSS contain property lets developers limit the scope of the browser's styles, layout and paint work for faster and more efficient rendering.

IE

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

Edge

  1. 12 - 18: Not supported
  2. 79 - 84: Supported
  3. 85: Supported

Firefox

  1. 2 - 40: Not supported
  2. 41 - 68: Disabled by default
  3. 69 - 79: Supported
  4. 80: Supported
  5. 81 - 82: Supported

Chrome

  1. 4 - 50: Not supported
  2. 51: Disabled by default
  3. 52 - 84: Supported
  4. 85: Supported
  5. 86 - 88: Supported

Safari

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

Opera

  1. 9 - 37: Not supported
  2. 38 - 39: Disabled by default
  3. 40 - 69: Supported
  4. 70: Supported

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14.0: Not supported

Opera Mini

  1. all: Not supported

Android Browser

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

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: 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 - 5.4: Not supported
  2. 6.2 - 11.2: Supported
  3. 12.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Disabled by default
Resources:
Google Developers article