.treecell-error
  {
    -moz-binding          : url("chrome://global/content/consoleBindings.xml#errormsg");
  }
  
#console[mode="errors"] > treechildren > treeitem > treerow > treecell[type="warning"]
  {
    display               : none;
  }
  
#console[mode="warnings"] > treechildren > treeitem > treerow > treecell[type="error"]
  {
    display               : none;
  }