diff --git a/browser/app/waterfox.exe.manifest b/browser/app/waterfox.exe.manifest
index 3b0ec902e6b7f..9d41634179116 100644
--- a/browser/app/waterfox.exe.manifest
+++ b/browser/app/waterfox.exe.manifest
@@ -36,6 +36,12 @@
     </ms_asmv3:requestedPrivileges>
   </ms_asmv3:security>
 </ms_asmv3:trustInfo>
+  <ms_asmv3:application xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
+    <ms_asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
+      <longPathAware xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">True</longPathAware>
+      <heapType xmlns="http://schemas.microsoft.com/SMI/2020/WindowsSettings">SegmentHeap</heapType>
+    </ms_asmv3:windowsSettings>
+  </ms_asmv3:application>
   <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
     <application>
       <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>