Firefox browser: How to display non-existing images the way IE/Opera does?

<img src='...' width='100' height='100' alt='...'></img>
or
<img src='...' alt='...' style='width:100px; height:100px;'></img>

/*
 * Show image placeholders
 */
@-moz-document url-prefix(http), url-prefix(https), url-prefix(file) {
  img:-moz-broken {
    -moz-force-broken-image-icon: 1;
    width: 24px;
    height: 24px;
  }
}