rem: this.tree.currentItem.firstChild.getAttribute("inline-edit") != "true") { if (aEvent.altKey) goDoCommand("cmd_properties"); else goDoCommand("cmd_open"); } 
add: this.tree.currentItem.firstChild.getAttribute("inline-edit") != "true") goDoCommand(aEvent.altKey ? "cmd_properties" : "cmd_open"); 
context:   treeKeyPress: function (aEvent)  {    if (this.tree.selectedItems.length > 1) return;    if (aEvent.keyCode == 113 && aEvent.shiftKey) {      const kNodeID = NODE_ID(this.tree.currentItem);      if (this.resolveType(kNodeId) == NC_NS + "Bookmark")        gBookmarksShell.commands.editCell (this.tree.currentItem, 1);    }    else if (aEvent.keyCode == 113)      goDoCommand("cmd_rename");    else if (aEvent.keyCode == 13 &&              this.tree.currentItem.firstChild.getAttribute("inline-edit") != "true") {      if (aEvent.altKey)        goDoCommand("cmd_properties");      else        goDoCommand("cmd_open");    }  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/8f8ee25f56f3b7656131e92a886b436476e19217/bookmarksTree.js/clean/xpfe/components/bookmarks/resources/bookmarksTree.js