How we built it

'allow-popups-to-escape-sandbox' sandboxing flag.

This is a new flag for `<iframe sandbox="...">` which will allow a sandboxed document to spawn new windows without forcing the sandboxing flags upon them. This will allow, for example, a third-party advertisement to be safely sandboxed without forcing the same restrictions upon a landing page.




Public discussion

Status in Chromium

Enabled by default (launch bug) in:

  • Chrome for desktop release 46
  • Chrome for Android release 46
  • Android WebView release 46
  • Opera release 34
  • Opera for Android release 34

Consensus & Standardization

  • No public signals
  • No public signals
  • No public signals
  • Positive


Last updated on 2015-07-31