Firefox ブックマークツールバーのボタンのツリー線を表示する

http://d.hatena.ne.jp/yamus/20081015/p1
を見ながらやってみたらできた。

/*
 * userChrome.css
 */
#bookmarksPanel treechildren::-moz-tree-line, 
#history-panel treechildren::-moz-tree-line, 
#pageSagePanel treechildren::-moz-tree-line, 
#sbTree treechildren::-moz-tree-line
{
    visibility:visible !important;
    border: 1px solid #999 !important;
}

#bookmarksPanel treechildren::-moz-tree-separator, 
#history-panel treechildren::-moz-tree-line, 
#pageSagePanel treechildren::-moz-tree-separator, 
#sbTree treechildren::-moz-tree-separator
{
    border-top: 1px solid #BBB !important;
    border-bottom: 1px solid #BBB !important;
    margin: 0px 3px 0px 3px !important;
}