This was added in bug 65197 to get the most reliable font for emojis (see rdar://problem/9842889) Chromium just removed it: https://chromium-review.googlesource.com/c/chromium/src/+/3279001/
<rdar://problem/85391983>
What’s the difference between this and https://bugs.webkit.org/show_bug.cgi?id=187878?
*** This bug has been marked as a duplicate of bug 187878 ***