Die duckface

/*Need more testing but it should work for now*/
@-moz-document domain("facebook.com")
  {
/*This part kills duckface in comments (doesn't work on status)*/
    .emoticon_pacman[title=":v"] {
    /*background-image: none !important;*/
      visibility: hidden !important;
    }
/*To replace duckface with your own text, uncomment this part and change the text*/
    /*.emoticon_pacman[title=":v"]:after {
      content: '(I am a retard please laugh at me oh god)' !important;
      display: inline-block !important;
      visibility: visible !important;
      position: absolute !important;
      font-style: italic !important;
    }*/
/*To kill all emoticon in status uncomment this part (not sure if it always works)*/
    /*.sp_LWp1MpKGrs1 {
      visibility: hidden !important;
    }*/
/*To kill all emoticon uncomment this part*/
    /*.emoticon {
      visibility: hidden !important;
    }*/
/*To kill all stickers in chat, uncomment this part*/
    /*.mvs
    {
      display: none !important;
    }*/
}