MDN URL: https://developer.mozilla.org/en-US/docs/Web/CSS/image-orientation

What information was incorrect, unhelpful, or incomplete?

As discussed in w3c/csswg-drafts/issues/5165, this behavior is no longer supported for cross-origin images. This severely limits its usefulness and means that the old default behavior (where EXIF data was ignored) can no longer be achieved for cross-origin images.

• Firefox bug (Open)
• Chromium bug (Closed)
• Webkit bug (Closed)

What did you expect to see?

The page should probably have a big callout about this.

Did you test this? If so, how?

Yes, I created a page that loads an image with an EXIF rotation and set image-orientation: none on it. When using a cross-origin image, the image was flipped according to the EXIF data (in Chrome). When using a same-origin image, the EXIF data was ignored.