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

:-moz-any(#main-window[tabsontop="true"][sizemode="normal"], #main-window[tabsontop="false"]) #TabsToolbar {-moz-transition: visibility .46s 0.55s, margin .45s ease-in-out .55s, opacity .25s ease-in-out .55s !important;min-height:26px!important;}

:-moz-any(#main-window[tabsontop="true"][sizemode="normal"], #main-window[tabsontop="false"]):not([stylish-url="about:addons"]) #navigator-toolbox:not(:hover):not([customizing="true"]) #nav-bar:not([collapsed="true"]) ~ #TabsToolbar {visibility:collapse;margin:-13px 0 !important; opacity:0;}