diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/common/tabs.js b/packages/node_modules/@node-red/editor-client/src/js/ui/common/tabs.js
index 269b2f357..d9dc4b289 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/common/tabs.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/common/tabs.js
@@ -551,6 +551,7 @@ RED.tabs = (function() {
         ul.find("li.red-ui-tab a")
             .on("mousedown", function(evt) { mousedownTab = evt.currentTarget })
             .on("mouseup",onTabClick)
+            // prevent browser-default middle-click behaviour
             .on("auxclick", function(evt) { evt.preventDefault() })
             .on("click", function(evt) {evt.preventDefault(); })
             .on("dblclick", function(evt) {evt.stopPropagation(); evt.preventDefault(); })
@@ -820,6 +821,7 @@ RED.tabs = (function() {
                 }
                 link.on("mousedown", function(evt) { mousedownTab = evt.currentTarget })
                 link.on("mouseup",onTabClick);
+                // prevent browser-default middle-click behaviour
                 link.on("auxclick", function(evt) { evt.preventDefault() })
                 link.on("click", function(evt) { evt.preventDefault(); })
                 link.on("dblclick", function(evt) { evt.stopPropagation(); evt.preventDefault(); })