Content Security Policy Level 2

- REC

Mitigate cross-site scripting attacks by only allowing certain sources of script, style, and other resources. CSP 2 adds hash-source, nonce-source, and five new directives

Chrome

  1. 4 - 35: Not supported
  2. 36 - 38: Partial support
  3. 39: Partial support
  4. 40 - 124: Supported
  5. 125: Supported
  6. 126 - 128: Supported

Edge

  1. 12 - 14: Not supported
  2. 15 - 18: Partial support
  3. 79 - 124: Supported
  4. 125: Supported

Safari

  1. 3.1 - 9.1: Not supported
  2. 10 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - TP: Supported

Firefox

  1. 2 - 30: Not supported
  2. 31 - 34: Partial support
  3. 35: Partial support
  4. 36 - 44: Partial support
  5. 45 - 125: Supported
  6. 126: Supported
  7. 127 - 129: Supported

Opera

  1. 9 - 22: Not supported
  2. 23 - 25: Partial support
  3. 26: Partial support
  4. 27 - 108: Supported
  5. 109: Supported

IE

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

Chrome for Android

  1. 124: Supported

Safari on iOS

  1. 3.2 - 9.3: Not supported
  2. 10 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6: Supported

Samsung Internet

  1. 4 - 23: Supported
  2. 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. 124: Supported

Firefox for Android

  1. 125: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
MDN Web Docs - Content Security Policy
HTML5Rocks article