diff --git a/application/palemoon/base/content/browser.js b/application/palemoon/base/content/browser.js
index 4521436063..4bb99c4589 100644
--- a/application/palemoon/base/content/browser.js
+++ b/application/palemoon/base/content/browser.js
@@ -1267,24 +1267,6 @@ var gBrowserInit = {
     }
 #endif
 
-    let appMenuButton = document.getElementById("appmenu-button");
-    let appMenuPopup = document.getElementById("appmenu-popup");
-    if (appMenuButton && appMenuPopup) {
-      let appMenuOpening = null;
-      appMenuButton.addEventListener("mousedown", function(event) {
-        if (event.button == 0) {
-          appMenuOpening = new Date();
-        }
-      }, false);
-      appMenuPopup.addEventListener("popupshown", function(event) {
-        if (event.target != appMenuPopup || !appMenuOpening) {
-          return;
-        }
-        let duration = new Date() - appMenuOpening;
-        appMenuOpening = null;
-      }, false);
-    }
-
     window.addEventListener("mousemove", MousePosTracker, false);
     window.addEventListener("dragover", MousePosTracker, false);