userChrome.css

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#urlbar {font-family:Tewi!important;font-size:11px!important;-moz-appearance:none !important;color:#dcdcbb!important;background-color:#333333!important;}
#toolbarbutton {font-family:Tewi!important;font-size:11px!important;}
:root {font-family:Tewi!important;font-size:11px!important;}
#main-window #navigator-toolbox {border-bottom:none!important;}
.treestyletab-tabbar-toolbar[treestyletab-mode="vertical"] > :not(toolbarpaletteitem) {border:none!important;box-shadow:none!important;background-color:#1d1d1d!important;color:#dcdcbb!important;border-top-color:#1d1d1d!important;}
.tabbrowser-tabs:not([treestyletab-tabbar-position="top"]) .tabbrowser-tab[selected="true"]{-moz-appearance:none!important;border:none!important;background-color:#333333!important;color:#dcdcbb!important;}
.tabbrowser-tab .tab-text {color:#dcdcbb!important;}
.tab.tabbrowser-tab {-moz-appearance:none!important;background-color:#1d1d1d!important;border:none!important;}
.tabbrowser-tabs:not([treestyletab-tabbar-position="top"]) .tabbrowser-tab:not([pinned]):not([selected="true"]) {border:none!important;box-shadow:none!important;background-color:#1d1d1d!important;color:#dcdcbb!important;border-top-color:#1d1d1d!important;}
.treestyletab-tabbar-toolbar[treestyletab-mode="vertical"] > :not(toolbarpaletteitem):hover {border:none!important;box-shadow:none!important;background-color:#1d1d1d!important;color:#dcdcbb!important;border-top-color:#1d1d1d!important;}
.treestyletab-splitter {-moz-appearance:none!important;background-color:#1d1d1d!important;}
#TabsToolbar {border-width:0px!important;}
.tabbrowser-tab:not([selected]) .tab-close-button {visibility: hidden !important}
.tabbrowser-tab:not([selected]):hover .tab-close-button {visibility: visible !important}
#new-tab-button, .tabs-newtab-button {-moz-appearance:none!important;background-color:#333333!important;}