doc/webdeveloper/stylesheets/outline_block_level_elements.css

   1 address, blockquote, h1, h2, h3, h4, h5, h6, p, pre
   2 {
   3     -moz-outline: 1px solid #ff0000 !important;
   4     outline: 1px solid #ff0000 !important;
   5 }
   6
   7 dd, dl, dt, ol, ul
   8 {
   9     -moz-outline: 1px solid #00ff00 !important;
  10     outline: 1px solid #00ff00 !important;
  11 }
  12
  13 div, form, table
  14 {
  15     -moz-outline: 1px solid #0000ff !important;
  16     outline: 1px solid #0000ff !important;
  17 }