Button Code

#back-button {
    list-style-image: url(./SVG/Back.svg) !important;
    padding-right: 0px !important;
    }

#forward-button {
    list-style-image: url(./SVG/Forward.svg) !important;
    padding-left: 6px !important;
    }

#back-button .toolbarbutton-icon {
    scale: 1.2 !important;
    padding-inline: calc(2*var(--toolbarbutton-inner-padding) - 6px) 0 !important;
    padding-block: calc(var(--toolbarbutton-inner-padding) - 3px) !important;
    }

    #forward-button .toolbarbutton-icon {
    scale: 2 !important;
    padding-inline: 0 calc(var(--toolbarbutton-inner-padding) + 2px) !important;
    padding-block: calc(var(--toolbarbutton-inner-padding) + 3px) !important;
    }