userChrome.css

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

#TabsToolbar .tab-content[pinned] {
padding: 0 9px !important;
height:18px!important;
}

.tabbrowser-tab:not([pinned]) {
max-width: 150px !important;
min-width: 80px !important;
height: 18px!important;
font-size: 11px !important;
}

.tabbrowser-arrowscrollbox {
background: #454545 !important;
}

#forward-button, #pageActionButton, #star-button-box, .autocomplete-history-dropmarker {
display: none !important;
}

#TabsToolbar {
margin: 0 44px 0 40vw !important;
height: 30px !important;
padding-left: 1px !important;
background: #454545 !important;
}

#nav-bar {
margin: -32px 60vw 0px 0px !important;
height: 32px !important;
padding: 0 0 0 0 !important;
}

#nav-bar-customization-target {
background: #454545 !important;
}

#navigator-toolbox {
background: #454545 !important;
}

#urlbar,#urlbar-container {
background: none !important;
border:none !important;
margin-left: 1px !important;
min-width: 200px !important;
font-size: 11px !important;
background: #454545 !important;
}

#urlbar:hover {
background:none !important;
border:none !important;
box-shadow:none !important;
background: #454545 !important;
}

#urlbar[focused="true"] {
background: none !important;
border:none !important;
box-shadow: none !important;
background: #454545 !important;
}

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

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

#PanelUI-button{
position: fixed;
top: 2px;
right: 4px;
border-inline-start: none;
}

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