See https://github.com/whatwg/html/pull/7320 - changes to the HTML parser - changes to the UA stylesheet - changes to a11y mapping (https://github.com/w3c/html-aam/pull/355)
<rdar://problem/107175819>
Pull request: https://github.com/WebKit/WebKit/pull/13887
Committed 264110@main (de16e2bb8b40): <https://commits.webkit.org/264110@main> Reviewed commits have been landed. Closing PR #13887 and removing active labels.