Hi Team, It is non-standard and should be removed from our implementation. Blink removal commit - https://chromium.googlesource.com/chromium/src.git/+/44cc3124a56262d937b36a3d6d0d3de626082716 Removed in Chrome 54 and long time back. Just wanted to raise so we can remove it as well. Thanks!
PR - https://github.com/WebKit/WebKit/pull/20725 (attempt)
Committed 270956@main (0465e17aaa0e): <https://commits.webkit.org/270956@main> Reviewed commits have been landed. Closing PR #20725 and removing active labels.
<rdar://problem/118630621>