Facebook Ads Extension

Check github repo to find out more about Facebook Ads Extension.

One of its features is purchase tracking on checkout success page. So to make it work perfectly please modify file app/code/community/Facebook/AdsExtension/Block/Purchase.php as shown below:

--- original content
+++ new content
@@ -20,10 +20,12 @@
   private $orderData = array();
 
   protected function _prepareLayout() {
-    $order = Mage::getSingleton('sales/order');
-    $order->loadByIncrementId(
-      Mage::getSingleton('checkout/session')->getLastRealOrderId()
-    );
+    // $order = Mage::getSingleton('sales/order');
+    // $order->loadByIncrementId(
+    //   Mage::getSingleton('checkout/session')->getLastRealOrderId()
+    // );
+    $order = Mage::registry('current_order');
     $totalData = $order->getData();
     $allitems = $order->getAllVisibleItems();
 
     $this->orderData['value'] = $totalData['grand_total'];

Tested on Facebook Ads Extension version 2.6.0. But has to work with other versions.