--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -7544,17 +7544,17 @@ nsGlobalWindow::MakeScriptDialogTitle(ns
         fixedURI->GetHost(host);
 
         if (!host.IsEmpty()) {
           // if this URI has a host we'll show it. For other
           // schemes (e.g. file:) we fall back to the localized
           // generic string
 
           nsAutoCString prepath;
-          fixedURI->GetPrePath(prepath);
+          fixedURI->GetDisplayPrePath(prepath);
 
           NS_ConvertUTF8toUTF16 ucsPrePath(prepath);
           const char16_t *formatStrings[] = { ucsPrePath.get() };
           nsContentUtils::FormatLocalizedString(nsContentUtils::eCOMMON_DIALOG_PROPERTIES,
                                                 "ScriptDlgHeading",
                                                 formatStrings,
                                                 aOutTitle);
         }