diff --git a/mozilla/toolkit/content/contentAreaUtils.js b/mozilla/toolkit/content/contentAreaUtils.js
index 51b637d7361..c3a05106dc1 100644
--- a/mozilla/toolkit/content/contentAreaUtils.js
+++ b/mozilla/toolkit/content/contentAreaUtils.js
@@ -622,7 +622,6 @@ nsHeaderSniffer.prototype = {
         }
       }
     }
-    fileName = fileName.replace(/^"|"$/g, "");
     return fileName;
   }
 };