--- a/browser/base/content/utilityOverlay.js
+++ b/browser/base/content/utilityOverlay.js
@@ -746,19 +746,19 @@ function trimURL(aURL) {
   // remove http://
   if (!url.startsWith("http://")) {
     return url;
   }
   let urlWithoutProtocol = url.substring(7);
 
   let flags = Services.uriFixup.FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP |
               Services.uriFixup.FIXUP_FLAG_FIX_SCHEME_TYPOS;
-  let fixedUpURL = Services.uriFixup.createFixupURI(urlWithoutProtocol, flags);
-  let expectedURLSpec;
+  let fixedUpURL, expectedURLSpec;
   try {
+    fixedUpURL = Services.uriFixup.createFixupURI(urlWithoutProtocol, flags);
     expectedURLSpec = makeURI(aURL).spec;
   } catch (ex) {
     return url;
   }
   if (fixedUpURL.spec == expectedURLSpec) {
     return urlWithoutProtocol;
   }
   return url;