Allow data: / blob: URLs in iframe src
Currently IE is an only browser I know to block blob:/data: URLs as an iframe src. Since iframes do not provide any other way to set Content-Type, this disallows some interesting client-side scenarios such as iframed SVG preview.
Richard Sentino commented
we're using iframe with a few hacks to make it work with Edge - ATM just plain text - however moving to lively doc content like adding images, etc via blob/data our hacks would be impossible to use now other than Edge is awesome ;)