diff --git a/packages/keychain/src/components/NavigationHeader.tsx b/packages/keychain/src/components/NavigationHeader.tsx
index edff50a3d..c26a9d855 100644
--- a/packages/keychain/src/components/NavigationHeader.tsx
+++ b/packages/keychain/src/components/NavigationHeader.tsx
@@ -24,9 +24,11 @@ export function NavigationHeader({
   // Check if we're in an iframe
   const isInIframe = window.self !== window.top;
 
-  // Determine which button to show based on navigation state
+  // Determine which button to show based on navigation state.
+  // In iframe/popup context, prefer close over back by default.
   const shouldShowBack =
-    forceShowBack || (canGoBack && !forceShowClose && !showClose);
+    forceShowBack ||
+    (!isInIframe && canGoBack && !forceShowClose && !showClose);
   const shouldShowClose =
     isInIframe && (forceShowClose || showClose || !shouldShowBack);