uBlock/platform/firefox/css/legacy-toolbar-button.css

#uBlock-legacy-button {
	list-style-image: url('../img/browsericons/icon-large.svg');
}
#uBlock-legacy-button.off {
	list-style-image: url('../img/browsericons/icon-large-off.svg');
}

toolbar[iconsize="small"] #uBlock-legacy-button {
	list-style-image: url('../img/browsericons/icon16.svg');
}
toolbar[iconsize="small"] #uBlock-legacy-button.off {
	list-style-image: url('../img/browsericons/icon16-off.svg');
}
#uBlock-legacy-button[badge]::before {
    position: fixed;
    margin-top: -2px;
    padding: 1px 2px;
    font-size: 9px;
    font-weight: bold;
    color: #fff;
    background: #666;
    content: attr(badge);
}
/* This hack required because if the before content changes it de-pops the popup (without firing any events). So just hide it instead. Note, can't actually *hide* it, or the same thing happens. '*/
#uBlock-legacy-button[badge=""]::before {
	padding: 0;
}

/* Override off state when in palette */
toolbarpaletteitem #uBlock-legacy-button.off {
	list-style-image: url('../img/browsericons/icon-large.svg');
}

/* Override badge when in palette */
toolbarpaletteitem #uBlock-legacy-button[badge]::before {
	content: none;
}

/* Prevent pale moon from showing the arrow underneath the button */
#uBlock-legacy-button .toolbarbutton-menu-dropmarker {
	-moz-box-orient: horizontal;
}