#preload-image { visibility: collapse; } #preload-image, treechildren::-moz-tree-twisty { -moz-appearance: none !important; -moz-context-properties: fill, fill-opacity, stroke, stroke-opacity !important; fill: green; fill-opacity: 0.5; stroke: purple; stroke-opacity: 0.2; list-style-image: url(treetwisty-context-paint.svg); }