rem: return; 
add: return false; 
context: function buildContextMenu(aEvent){  if (aEvent.target.id != "downloadContextMenu")    return;      var popup = document.getElementById("downloadContextMenu");  while (popup.hasChildNodes())    popup.removeChild(popup.firstChild);    if (gDownloadsView.selected) {    var idx = parseInt(gDownloadsView.selected.getAttribute("state"));    if (idx < 0)      idx = 0;        var menus = gContextMenus[idx];    for (var i = 0; i < menus.length; ++i)      popup.appendChild(document.getElementById(menus[i]).cloneNode(true));        return true;  }    return false;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/3c2553f425837c0ac00c77b81c1ddb6b63e2d23e/downloads.js/clean/toolkit/mozapps/downloads/content/downloads.js