#login-buttons-image-facebook {
    background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAq0lEQVQ4jWP8//8/AyWAhYGBgcEmauYZBgYGYxL1nj2yLN2ECcohVTNcDwsxKlXlhRm6yzwZRAS5GRgYGBhsombC5ZhwaUIGyJrRAVEuwGYzSS7AB/C64MiydKx8ZJfgNeDN+68MDAwIL8D4RLsgIHsJis0wPjKgOAyoE4hcnGwMGkpiBBUbacvA2TfuvaKiC759/3X23NUnOPMDtgTEwMBwloGBgYGR0uwMAGOPLJS9mkQHAAAAAElFTkSuQmCC);
}