Enables support for CSS Cascade Layers. See the <a data-l10n-name="spec">in-progress specification</a> for details. File bugs blocking <a data-l10n-name="bugzilla">bug 1699215</a> for bugs related to this feature.
启用对 CSS Cascade Layers 的支持。更多信息，请参阅<a data-l10n-name="spec">编撰中的规范</a>。若要提交与此功能相关的任何 bug，请 block <a data-l10n-name="bugzilla">Bug 1699215</a>。