diff --git a/lib/gollum/frontend/public/gollum/javascript/gollum.js b/lib/gollum/frontend/public/gollum/javascript/gollum.js
index 6dae3d06..b58d5ab2 100755
--- a/lib/gollum/frontend/public/gollum/javascript/gollum.js
+++ b/lib/gollum/frontend/public/gollum/javascript/gollum.js
@@ -4,7 +4,8 @@ $(document).ready(function() {
     var ok = confirm($(this).data('confirm'));
     if ( ok ) {
       var loc = window.location;
-      loc = baseUrl + '/delete' + loc.pathname
+      // location.origin is not in Firefox so use protocol + host
+      loc = loc.protocol + '//' + loc.host + baseUrl + '/delete' + loc.pathname.replace(baseUrl,'')
       window.location = loc;
     }
     // Don't navigate on cancel.