Failed loading page into iframe locally

[ausi]

Looks like loading the page into an iframe doesn’t work with local files, see https://twitter.com/SaraSoueidan/status/855350186452844544.

[ausi]

I did a quick test and can confirm that issue in Chrome and Opera. Firefox and Safari seem to work.

[shoesforindustry]

Sadly as well as the above, this seems to now happen on all my browsers including the latest Firefox 89 , Safari Version 14.1.1 (16611.2.7.1.4) and Release 125 (Safari 14.2, WebKit 16612.1.15.1.12), all on Mac.