Waterfox CSS

:root {
    --background:   #1c1e22;
    --foreground:   #e6e8ef;
    --black:        #23252b;
    --red:          #b54036;
    --green:        #5ab977;
    --yellow:       #deb566;
    --blue:         #6a7c93;
    --magenta:      #a4799d;
    --cyan:         #3f94a8;
    --white:        #e6e8ef;
}

* {
    font: 3mm tahoma,arial,helvetica,sans-serif;
}

#toolbar #urlbar-container {
   box-sizing:border-box !important;
   background:none !important;
   z-index:1 !important;
}

#TabsToolbar {
   border-width:0px !important;
   border-style: solid;
   border-color:transparent !important;
   margin-bottom:-4px !important;
   margin-top:0px !important;
   padding:0px !important;
   margin-left:23.05vw !important;
}

#TabsToolbar .titlebar-placeholder {
   display: none !important;
}

#TabsToolbar, #tabbrowser-tabs, #nav-bar, #toolbar-menubar, #browser-panel {
   /*! background-color:rgb(231, 232, 235) !important; */
}

.tab-line {
   display: none !important;
}


#PanelUI-button {
   position:absolute;
   top:2px;
   right:0px;
}


/*
#nav-bar {
   border-width:1px !important;
   border-style: solid;
}*/
#nav-bar {
   margin-bottom:-1px !important;
   margin-top:-29px !important;
   margin-right: 77vw !important;
   margin-left: -0.2vw!important;
   padding-right: 0px !important;
}

#urlbar, #urlbar-container {
   background-color:var(--black) !important;
}

#urlbar-container {
   border:none !important;
   top:0px;
   padding-left: 28px !important;
}

#nav-bar, #urlbar-container, #urlbar, #TabsToolbar, #tabbrowser-tabs, brow {
   min-width: unset !important;
   width: unset !important;
   max-width: unset !important;
}


#back-button {
   display: none !important;
}
#forward-button {
   display: none !important;
}

.arrowscrollbox-scrollbox {
    padding-inline-start: 0px;
}

#navigator-toolbox {
   background-color: var(--background) !important;
   color: var(--foreground);
   /*border-width: 0 0 3px 0 !important;
   border-style: solid;
   border-color: #8fa1b3;*/
}

#navigator-toolbox * {
   max-height: 50px;
   background-color:  var(--black);
   color: var(--foreground);
   border-width: 0px !important;
   padding: 0px;
   box-shadow: none;
   background-image: none;
}

.tab-content { padding-inline-start: 0px;}
.tab-background { margin: 0 !important; }
.tab-background > * { pointer-events: auto !important; }
.tab-background-start,.tab-background-end {width:0 !important; opacity: 0 !important;}
.tab-background-middle[selected="true"] {
   background-clip:inherit !important;
   background-color: var(--black) !important;
   background-image: none !important;
   background-repeat:no-repeat !important;
}

.tab-icon-image {
   filter: grayscale(1);
}

.tab-label-container{}

.tab-text {color:var(--foreground) !important;}

.tabbrowser-tab {background-color: var(--blue) !important;}

.tabbrowser-tab[visuallyselected="true"] * {
   background-color: var(--background) !important;
}

.tabs-newtab-button {
   background-image: none !important;
   transition: background-color 0.5s !important;
}

.toolbarbutton-icon {
   background-color: transparent !important;
}

.tabs-newtab-button:hover {
   background-image: none !important;
   background-color: var(--black) !important;
   transition: background-color 0.5s !important;
}

#nav-bar {
   padding: 0px;
   box-shadow: none !important;
   background-image:none !important;
   background-color: var(--black) !important;
   height:4vh !important;
   max-height:4vh !important;
   min-height:4vh !important;
}
#nav-bar-customization-target {
   width: 21vw !important;
   min-width: 21vw !important;
   max-width: 21vw !important;
}
#PanelUI-button {
   margin-top: 2px;
   /*! margin-left: -5px !important; */
}

#PanelUI-menu-button {
   padding-inline-start: 0px !important;
   padding-inline-end: 0px !important;
}

#urlbar-wrapper {
   margin-top: 0px !important;
   clip-path: unset !important;
}

#tabbrowser-tabs {
   min-height: 4vh !important;
   max-height: 4vh !important;
   height: 4vh !important;
}
#content browser {
   margin-right: -20px !important;
   overflow-y: scroll;
   overflow-x: hidden;
}

#content-deck {
   border-style: solid;
   border-width: 0px 0 0px 0;
   border-color: var(--blue);
}

.autocomplete-history-dropmarker,#identity-box,#urlbar-icons,#reload-button,#stop-button,#sidebar-button,#search-container,#urlbar-search-splitter,#bookmarks-menu-button,#downloads-button {
   display: none;
}

.autocomplete-textbox-container {
   background-color: var(--background) !important;
   color: var(--foreground) !important;
}

toolbarbutton:hover * {
   background-color: var(--background) !important;
   box-shadow: none !important;
   color: var(--background) !important;
   border:none !important;
}

browser * {
   background-color: var(--background) !important;
}