HTMLFieldsetElement behavior for :enabled / :disabled CSS selectors is incorrect since 264098@main (when sendMouseEventsToDisabledFormControlsEnabled experimental flag is enabled). This is because it updated HTMLFieldSetElement::isDisabledFormControl() to return false. However, the CSS selector should rely on the "actually disabled" state, not the "disabled" state.
Pull request: https://github.com/WebKit/WebKit/pull/14959
Committed 265166@main (a6d354d7281c): <https://commits.webkit.org/265166@main> Reviewed commits have been landed. Closing PR #14959 and removing active labels.
<rdar://problem/110799351>