diff --git a/web/app.js b/web/app.js
index caeeb37da..4db5dceb9 100644
--- a/web/app.js
+++ b/web/app.js
@@ -658,8 +658,10 @@ let PDFViewerApplication = {
       this.setTitleUsingUrl(file.originalUrl);
       parameters.url = file.url;
     }
-    if (typeof PDFJSDev !== 'undefined' &&
-        PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
+    if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
+      parameters.docBaseUrl = document.URL.split('#')[0];
+    } else if (typeof PDFJSDev !== 'undefined' &&
+               PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
       parameters.docBaseUrl = this.baseUrl;
     }