diff --git a/static/js/sessions.js b/static/js/sessions.js
index fb13af3b..9ba9178b 100644
--- a/static/js/sessions.js
+++ b/static/js/sessions.js
@@ -825,17 +825,18 @@ function createSessionItem(s) {
     } else {
       // Position the dropdown using viewport coords
       const rect = menuBtn.getBoundingClientRect();
+      const z = parseFloat(getComputedStyle(document.documentElement).zoom) || 1;
       dropdown.style.left = '';
-      dropdown.style.right = (window.innerWidth - rect.right) + 'px';
+      dropdown.style.right = (window.innerWidth - rect.right / z) + 'px';
       // Show off-screen first to measure height
       dropdown.style.top = '-9999px';
       dropdown.style.display = 'block';
       const ddRect = dropdown.getBoundingClientRect();
       // Flip above if not enough room below
-      if (rect.bottom + 2 + ddRect.height > window.innerHeight) {
-        dropdown.style.top = Math.max(2, rect.top - ddRect.height - 2) + 'px';
+      if (rect.bottom / z + 2 + ddRect.height / z > window.innerHeight) {
+        dropdown.style.top = Math.max(2, rect.top / z - ddRect.height / z - 2) + 'px';
       } else {
-        dropdown.style.top = rect.bottom + 2 + 'px';
+        dropdown.style.top = rect.bottom / z + 2 + 'px';
       }
     }
   });
@@ -2669,14 +2670,15 @@ function _showDropdown(anchorEl, items) {
 
   // Position using viewport coords (same pattern as session menus)
   const rect = anchorEl.getBoundingClientRect();
-  dd.style.right = (window.innerWidth - rect.right) + 'px';
+  const z = parseFloat(getComputedStyle(document.documentElement).zoom) || 1;
+  dd.style.right = (window.innerWidth - rect.right / z) + 'px';
   dd.style.top = '-9999px';
   dd.style.display = 'block';
   const ddRect = dd.getBoundingClientRect();
-  if (rect.bottom + 2 + ddRect.height > window.innerHeight) {
-    dd.style.top = Math.max(2, rect.top - ddRect.height - 2) + 'px';
+  if (rect.bottom / z + 2 + ddRect.height / z > window.innerHeight) {
+    dd.style.top = Math.max(2, rect.top / z - ddRect.height / z - 2) + 'px';
   } else {
-    dd.style.top = (rect.bottom + 2) + 'px';
+    dd.style.top = (rect.bottom / z + 2) + 'px';
   }
 
   function close() { dd.remove(); }