richlistbox.theme-listbox { background: var(--material-background); border: var(--material-panedivider); // Prevent horizontal scrollbar on Windows overflow-x: hidden; richlistitem { --listitem-selectedBackground: var(--tag-gray); --listitem-selectedFocusCurrentBackground: var(--color-accent); --listitem-selectedTextColor: var(--color-accent-text); --listitem-selectedBorder: transparent; --listitem-selectedBottomBorder: transparent; --listitem-selectedCurrentBorder: transparent; --listitem-selectedFocusBorder: transparent; --listitem-selectedFocusBottomBorder: transparent; --listitem-selectedFocusCurrentBorder: transparent; --listitem-selectedFocusBackground: var(--color-accent); --listitem-selectedFocusColor: var(--accent-white); --listitem-selectedColor: var(--accent-white); --listitem-selectedFocusCurrentBottomBorder: transparent; } } richlistitem { padding: 0.2em 0.4em; } richlistitem, richlistitem * { // Prevent word cut-off with double-byte characters overflow: hidden; white-space: nowrap; text-overflow: ellipsis; width: 100%; } richlistcheckbox[selected=true] { background-color: -moz-cellhighlight; color: -moz-cellhighlighttext; }