/* (BUGGY: USE AT OWN RISK!) Hide toolbar buttons other than extensions */

.toolbarbutton-icon,
.toolbarbutton-badge-stack,
#nav-bar .toolbarbutton-1
{
    transition-duration: 0.1s !important;
    transition-property: width, padding, border !important;
}
:root:not([customizing]) #navigator-toolbox:not(:hover) > #nav-bar:not([urlbar-exceeds-toolbar-bounds="true"]) .toolbarbutton-1:not(.webextension-browser-action, [open], [checked]) :-moz-any(.toolbarbutton-icon, .toolbarbutton-badge-stack)
{
    width: 0 !important; padding: 0 !important;
}
:root:not([customizing]) #navigator-toolbox:not(:hover) > #nav-bar:not([urlbar-exceeds-toolbar-bounds="true"]) .toolbarbutton-1:not(.webextension-browser-action, [open], [checked])
{
    border-width: 0 !important;
}

/* Also Hide urlbar background */
/*
:root:not([customizing]) #navigator-toolbox:not(:hover) > #nav-bar
{ --toolbar-field-background-color: transparent !important; }
*/