Quick update:
This should be fixed now. I was right about the attribute value missing. Both the test script and video embeds should be back to working again. I tested it with the landing page project and everything works.
In case anyone is interested, here is the message I got back:
Hey there,
Yea. We finally figured out the issue. We accidentally removed an iFrame sandbox value
allow-same-origin. It’s fixed and both examples work on FF again.Thanks for taking the time to write in about the bug. This one was very frustrating.