copy-paste to shell basic css

.malicious {
  color: #f3f5f6; // set it to that of the page
  font-size: 0px; // make it small
  // move it out of the way
  position: absolute;
  left: -100px;
  top: -100px;
  height: 0px;
  z-index: -100;
  display: inline-block;
  // make it un-selectable
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}