CSS3 Opacity

- REC

IE

  1. 8
  2. 9
  3. 10
  4. 11

Edge

  1. 15
  2. 16
  3. 17
  4. 18
  5. 76

Firefox

  1. 64
  2. 65
  3. 66
  4. 67
  5. 68
  6. 69

Chrome

  1. 72
  2. 73
  3. 74
  4. 75
  5. 76
  6. 77
  7. 78

Safari

  1. 11
  2. 11.1
  3. 12
  4. 12.1
  5. 13
  6. TP

Opera

  1. 55
  2. 56
  3. 57
  4. 58

iOS Safari

  1. 11.0-11.2
  2. 11.3-11.4
  3. 12.0-12.1
  4. 12.2
  5. 13

Opera Mini

  1. all

Android Browser

  1. 4.2-4.3
  2. 4.4
  3. 4.4.3-4.4.4
  4. 67

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 11.5
  2. 12
  3. 12.1
  4. 46

Chrome for Android

  1. 74

Firefox for Android

  1. 67

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 11.8

Samsung Internet

  1. 6.2-6.4
  2. 7.2-7.4
  3. 8.2
  4. 9.2

QQ Browser

  1. 1.2

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

Transparency for elements in IE8 and older can be achieved using the proprietary "filter" property and does not work well with PNG images using alpha transparency.