.MouseSelection {
  position: absolute;
  z-index: 1;
}
/* Internet Explorer support method */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
  .MouseSelection {opacity: 0.5 }
}

/* Microsoft Edge Browser 12+ (All) - @supports method */
@supports (-ms-ime-align:auto) {
  .MouseSelection {opacity: 0.5 }
}