Iframe embedder - no permissions, no relative paths
Iframe embedder (1.0.22) doesn't allow to use permissions on iframes. This permanently and irreversibly blocks functionality of recording audio and video inside iframes. At least in Chrome. Thus I consider it a bug, not a feature request. For more information see: https://dev.chromium.org/Home/chromium-security/deprecating-permissions-in-cross-origin-iframes