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

@media all and (-moz-windows-classic) {

#main-window:not([stylish-application-version^="28"]):not([stylish-application-version^="29"]):not([stylish-application-version^="30"]):not([stylish-application-version^="31"])[sizemode="maximized"][tabsintitlebar="true"]:not(:-moz-lwtheme) #TabsToolbar {
    -moz-appearance: -moz-window-titlebar-maximized !important;
    box-shadow: 0 -1px 0 threedshadow inset !important;
    margin-top: -4px !important;
    }

#main-window:-moz-any([stylish-application-version^="28"], [stylish-application-version^="29"], [stylish-application-version^="30"], [stylish-application-version^="31"]) #TabsToolbar:not(:-moz-lwtheme) {
    background-image: none !important;
    box-shadow: 0 -2px 0 threedshadow inset !important;
    }

}

@media all and (-moz-windows-theme: aero) {

#main-window:not([stylish-application-version^="28"]):not([stylish-application-version^="29"]):not([stylish-application-version^="30"]):not([stylish-application-version^="31"])[sizemode="maximized"][tabsintitlebar="true"]:not(:-moz-lwtheme) #TabsToolbar:not(:-moz-system-metric(windows-compositor)) {
    background-image: linear-gradient(to top, rgba(26, 26, 26, .4), rgba(26, 26, 26, .4) 1px, transparent 1px) !important;
    }

}