FireFox: Tabs in the title bar on Australis UI

tabs_in_titlebar_australis.css

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


#main-window[chromemargin][sizemode="normal"]:not([inFullscreen])
#navigator-toolbox {
    overflow: visible;
}

#main-window[chromemargin][sizemode="normal"]:not([inFullscreen])
#nav-bar {
    -moz-padding-start: 0 !important;
    -moz-padding-end: 0 !important;
    margin: -2.2em 9.0em 0.15em 3.1em !important;
    -moz-appearance: -moz-win-glass !important;
    box-shadow: none !important;
}

#main-window[chromemargin][sizemode="normal"]
#PersonalToolbar:not([inFullscreen]) {
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
}

/* maximized window */
#main-window[chromemargin]:not([inFullscreen]):not([sizemode="normal"])
#nav-bar {
    margin-right: 9.2em !important;
    margin-top: -2.7em !important;
}


/* TST for some reason has a grey area at its top when the titlebar is not active
 * (probably because I made the titlebar appear on top and it doesn't account for that) */

#main-window[sizemode="normal"]:not([inFullscreen])
#TabsToolbar:not(:-moz-lwtheme).treestyletab-tabbar-toolbar {
    top: 40px !important; /* 19px less */
}

#main-window[sizemode="maximized"]:not([inFullscreen])
#TabsToolbar:not(:-moz-lwtheme).treestyletab-tabbar-toolbar {
    top: 52px !important;
}

Context: piroor/treestyletab#657 (comment)