@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url(http://userstyles.org/) , url("https://userstyles.org/") {

#sidebar > ul {                       
   -moz-column-count: 2 !important;
   font-size: 15px !important;        
   margin-bottom: 10px !important; 
   }
}