See https://wpt.fyi/results/html/semantics/forms/the-label-element/proxy-modifier-click-to-associated-element.tentative.html?run_id=5180151497752576&run_id=5160429880344576&run_id=5074162928844800&run_id=5179373773127680 Bisecting this points at 263420@main. The commit message says: > This patch aligns WebKit with Blink / Chromium and Gecko / Firefox. But the WPT results clearly show differences remain, and indeed some of these (admittedly tentative) tests regress from stable to STP. See also https://github.com/web-platform-tests/wpt/pull/23781 where these tests were introduced. It's not implausible we want to allow for platform-specific differences here with how modifiers behave, but we should fix the regression either by fixing WebKit or fixing the test.
<rdar://problem/112972797>
Happy to revert 263420@main
Reverting in bug 259558
Reverted now, so I think we can mark this as 'CONFIGURATION CHANGED'.
*** This bug has been marked as a duplicate of bug 259558 ***