diff --git a/lib/content/mixin.js b/lib/content/mixin.js
index 2e51989bd..3cb047876 100644
--- a/lib/content/mixin.js
+++ b/lib/content/mixin.js
@@ -9,6 +9,7 @@ const interactionEvents = [
   'updateContentState',
   'startTracking',
   'navigateTo',
+  'finished',
 ];
 
 const fileFieldMap = {