diff --git a/module/extension/control.php b/module/extension/control.php
index 3d7e51b94e..f88933e476 100644
--- a/module/extension/control.php
+++ b/module/extension/control.php
@@ -89,7 +89,7 @@ class extension extends control
     {
         /* Init vars. */
         $type       = strtolower($type);
-        $moduleID   = $type == 'bymodule' ? (int)$param : 0;
+        $moduleID   = $type == 'bymodule' ? (int)base64_decode($param) : 0;
         $extensions = array();
         $pager      = null;
 
diff --git a/module/extension/css/obtain.css b/module/extension/css/obtain.css
index 43cfa0743a..00a2b3495f 100644
--- a/module/extension/css/obtain.css
+++ b/module/extension/css/obtain.css
@@ -1 +1,3 @@
 .pager {margin-top: 0;}
+.tree li>a:hover {color: #fff; background-color: #0c64eb;}
+.tree li>a.active  {color: #fff; background-color: #0c64eb;}