How do I remove this underline? Not text-decoration

How do I remove this underline? Not text-decoration
0

#1

When I add X or O to the thumbnail, it remains underlined. I can’t figure out why :confused:

http://codepen.io/shawngrooms/pen/mOEgyG?editors=1100


#2

Add this to your css:

a.thumbnail:link {
  text-decoration: none;
}

Also check your layout in firefox.