diff --git a/scripts/Windows/Software/Firefox/Install.ps1 b/scripts/Windows/Software/Firefox/Install.ps1
index 1c1ad563a..dc9c72a7c 100644
--- a/scripts/Windows/Software/Firefox/Install.ps1
+++ b/scripts/Windows/Software/Firefox/Install.ps1
@@ -18,6 +18,7 @@ function Install-Firefox {
     $defaultAssociations.PreserveWhitespace = $true;
     $reader = [System.Xml.XmlReader]::Create("$configFile", $readerSettings);
     $defaultAssociations.Load($reader);
+    $reader.Dispose();
 
     $extensions = @(
         ".htm",