diff --git a/calendar/base/content/calendar-views-utils.js b/calendar/base/content/calendar-views-utils.js
index d8953f415c..4d7b0b5a88 100644
--- a/calendar/base/content/calendar-views-utils.js
+++ b/calendar/base/content/calendar-views-utils.js
@@ -460,7 +460,10 @@ function toggleShowCompletedInView() {
  */
 function showCalControlBarMenuPopup(event) {
   const moreContext = document.getElementById("calControlBarMenuPopup");
-  moreContext.openPopup(event.target, { triggerEvent: event });
+  moreContext.openPopup(event.target, {
+    position: "after_end",
+    triggerEvent: event,
+  });
 }
 
 /**
diff --git a/mail/base/content/about3Pane.js b/mail/base/content/about3Pane.js
index 42a9c5bf1e..2807650e01 100644
--- a/mail/base/content/about3Pane.js
+++ b/mail/base/content/about3Pane.js
@@ -4142,7 +4142,10 @@ var threadPaneHeader = {
     this.displayButton = document.getElementById("threadPaneDisplayButton");
     this.displayContext = document.getElementById("threadPaneDisplayContext");
     this.displayButton.addEventListener("click", event => {
-      this.displayContext.openPopup(event.target, { triggerEvent: event });
+      this.displayContext.openPopup(event.target, {
+        position: "after_end",
+        triggerEvent: event,
+      });
     });
   },
 
diff --git a/mail/base/content/widgets/tree-view.mjs b/mail/base/content/widgets/tree-view.mjs
index e596eaf672..ae8b60bcb0 100644
--- a/mail/base/content/widgets/tree-view.mjs
+++ b/mail/base/content/widgets/tree-view.mjs
@@ -2440,7 +2440,10 @@ class TreeViewTableColumnPicker extends HTMLTableCellElement {
     });
 
     this.#button.addEventListener("click", event => {
-      this.#context.openPopup(event.target, { triggerEvent: event });
+      this.#context.openPopup(event.target, {
+        position: "after_end",
+        triggerEvent: event,
+      });
     });
   }