Can I use
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Document Policy

- UNOFF

A mechanism that allows developers to set certain rules and policies for a given site. The rules can change default browser behaviour, block certain features or set limits on resource usage. Document Policy is useful both for security and performance, and is similar to Permissions Policy.

IE

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

Edge

  1. 12 - 84: Not supported
  2. 85 - 86: Partial support
  3. 87: Partial support

Firefox

  1. 2 - 82: Not supported
  2. 83: Not supported
  3. 84 - 85: Not supported

Chrome

  1. 4 - 84: Not supported
  2. 85 - 86: Partial support
  3. 87: Partial support
  4. 88 - 90: Partial support

Safari

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

Opera

  1. 9 - 71: Not supported
  2. 72: Not supported

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Partial support

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Not supported

Chrome for Android

  1. 87: Partial support

Firefox for Android

  1. 83: Not supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4 - 12.0: Not supported
  2. 13.0: Not supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported

Standard support includes the HTTP Document-Policy header and policy attribute on iframes.

Resources:
Chromium tracking bug for new policies
W3C - Document Policy Explainer
Firefox position: non-harmful