userChrome.css

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

/* Reduce width of pinned tabs by reducing the left and right padding */

#TabsToolbar .tab-content[pinned] {
	padding: 	0 9px !important;
}

/* Move tabs over to right to make room for address bar */

#TabsToolbar {
	margin: 		0 44px 0 40vw !important;
	height: 		30px !important;
	padding-left:	5px !important;
}

/* Move address bar to titlebar with tabs */

#nav-bar {
	margin: 		-30px 60vw -2px 80px !important;
	height:			29px !important;
	border-bottom:	1px solid #9E9E9E !important;
}

/* URL bar width adjustments */

#urlbar {
	background:		none !important;
	border:			none !important;
	margin-left:	-5px !important;
	min-width:		470px !important;
	font-size:		12px !important;
}

#urlbar:hover {
	background:		none !important;
	border:			none !important;
	box-shadow:		none !important;
}

#urlbar[focused="true"] {
	background:		none !important;
	border:			none !important;
	box-shadow:		none !important;
}

/* Hide bookmark folder icons */

.bookmark-item > .toolbarbutton-icon {
	display: 	none !important;
}

/* Increase bookmarks toolbar height */

#PersonalToolbar {
	margin-top: 2px !important;
	height:		28px !important;
	border-top:	1px solid #9E9E9E !important;
}

/* Minor bookmarks toolbar spacing adjustments */

#personal-bookmarks toolbarbutton.bookmark-item, #personal-bookmarks toolbarbutton {
	background: 	 none !important;
	box-shadow: 	 none !important;
	margin: 		 -1px 0px -1px 2px !important;
	padding: 		 0px 5px !important;
	-moz-appearance: none !important; }

#personal-bookmarks toolbarbutton:hover {
	-moz-appearance: none !important;
	background: 	 none !important;
	text-shadow: 	 none !important;
	color: 			 #000 !important;	}

/* Add vibrancy to toolbar, titlebar, and navbar */

#TabsToolbar, #titlebar, #nav-bar {
	-moz-appearance: -moz-mac-vibrancy-light !important;
}


/* Remove line under address bar */

#navigator-toolbox::after{
	content:	none;
}

/* Affix hamburger menu to top right */

#PanelUI-button{
	position: 	fixed;
	top: 		2px;
	right: 		4px;
}

/* Hide titlebar placeholder for caption buttons so that padding between tabs and address bar isn't so ridiculously large */

.titlebar-placeholder[type="caption-buttons"] {
	-moz-box-ordinal-group: 1 !important;
}