+#bookmarks-menu-button[cui-areatype="toolbar"][starred][open="true"],
+#bookmarks-menu-button[cui-areatype="toolbar"][starred] > .toolbarbutton-menubutton-button[open="true"] {
+ /* When starred and clicked (for edit/delete dialog),
+ * then only the menubutton-button itself is open, but not the whole menubutton. */