This css file is awesome !!! Share

[1human]

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar > .toolbar-items {
opacity: 0;
pointer-events: none;
}

#main-window:not([tabsintitlebar="true"]) #TabsToolbar {
visibility: collapse !important;
}

#nav-bar {
margin-right:140px;
}

/* Some space on top to allow window dragging */
#titlebar {
appearance: none !important;
height: 4px;
}

/* Fix for main menu calling by Alt button */
#titlebar > #toolbar-menubar {
margin-top: 10px;
}

.titlebar-buttonbox-container {
display: block;
height: 40px;
margin-top: -1px;
}

.titlebar-buttonbox-container .titlebar-button {
display: block;
height: 41px;
}

:root {
--sidebar-min-width: 30px;
--sidebar-visible-width: 60px;
}

#sidebar-header {
overflow: hidden !important;
}

#sidebar-box #sidebar-header {
display: none !important;
}

#sidebar,
#sidebar-header {
position: relative !important;
min-width: var(--sidebar-min-width) !important;
max-width: var(--sidebar-min-width) !important;
transition: .1s ease .05s;
z-index:1;
}

#sidebar-box:hover :-moz-any(#sidebar,#sidebar-header) {
background-color: var(--toolbar-bgcolor) !important;
min-width: var(--sidebar-visible-width) !important;
max-width: var(--sidebar-visible-width) !important;
margin-right: calc((var(--sidebar-visible-width) - var(--sidebar-min-width)) * -1) !important;
z-index:1;
position: relative !important;
transition: .1s ease .05s;

}

[1human]

Thanks for share!!
https://github.com/Graklinghunter/Hovertext-Css