.fa-star::before {
background: url(https://s3-ap-northeast-1.amazonaws.com/mstdn/custom_emojis/images/000/003/309/original/b9ef019fc883264a.png);
background-repeat: no-repeat;
background-size: 100%;
filter: grayscale(100%) brightness(200%) opacity(50%);
content: "\2003";
}
.active > .fa-star::before, .notification__favourite-icon-wrapper > .fa-star::before {
filter: grayscale(0%) brightness(100%) opacity(100%);
}

#MSTL