rem: aEvent.preventBubble(); 
add: aEvent.stopPropagation(); 
context: function onViewMenuColumnItemSelected(aEvent){  var colid = aEvent.target.getAttribute("colid");  if (colid != "") {    var bookmarksView = document.getElementById("bookmarks-view");    bookmarksView.toggleColumnVisibility(colid);  }    aEvent.preventBubble();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/04cfde2d6fd8dbf1abe2b7ec6ca8d6cbb0386d6d/bookmarksManager.js/clean/xpfe/components/bookmarks/resources/bookmarksManager.js