@-moz-document url("chrome://browser/content/browser.xul") {

#browser {
-moz-box-direction: reverse !important;
-moz-box-orient: vertical !important;
}

#sidebar-splitter {
height: 8px !important;
}

#sidebar-splitter:hover {
cursor: row-resize !important;
}

#sidebar {
max-width: none !important;
}

}