Change the initial value of document.designMode from "inherit" to "off" and remove support for "inherit".


Established standard

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 43
  • Chrome for Android release 43
  • Android WebView release 43

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • No signal
  • No signals



Firefox already implements this behavior, and IE effectively implements it as well. The proposed behavior also matches the spec and removes implementation complexity for out-of-process iframes.

Last updated on 2020-11-09