.content.selectable[contenteditable="true"]:focus::after,
.content.selectable[contenteditable="true"]:hover::after,
.content.selectable[contenteditable="true"].focused::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;  
  border: 2px dashed #000;  
  box-sizing: border-box;  
  pointer-events: none; /* FF mouse events workaround */
}