https://w3c-test.org/css/css-pseudo/first-letter-001.html should look like https://w3c-test.org/css/css-pseudo/first-letter-001-ref.html, but it ends up displaying red on the right edges of the box.

This is probably low priority, as it fails (in different ways) in each browser: Edge displays a green box that is twice as large as the reference page, and Firefox displays green on top with red on the bottom.