diff --git a/api/Notification.json b/api/Notification.json
index dccc24a78fd5b8..7b91e810a82831 100644
--- a/api/Notification.json
+++ b/api/Notification.json
@@ -251,7 +251,7 @@
               "version_added": "18"
             },
             "firefox": {
-              "version_added": false
+              "version_added": "preview"
             },
             "firefox_android": "mirror",
             "ie": {