userContent.css prank

@-moz-document regexp("http.*"), url-prefix(about:) {
  @keyframes blur-blue {
    from {
      text-shadow: 0px 0px 0px rgba(0,0,200,1);
    }

    to {
      text-shadow: 0px -10px 12px rgba(0,0,200,0);
    }
  }

  @keyframes blur-black {
    from {
      text-shadow: 0px 0px 0px rgba(0,0,0,1);
    }

    to {
      text-shadow: 0px -10px 12px rgba(0,0,0,0);
    }
  }

  a:hover {
    color: transparent !important;
    animation-duration: .6s;
    animation-name: blur-blue;
    animation-timing-function: ease-out;
  }

  input:hover, button:hover, select:hover, textarea:hover {
    color: transparent !important;
    animation-duration: .6s;
    animation-name: blur-black;
    animation-timing-function: ease-out;
  }
}