diff --git a/tutorial.md b/tutorial.md
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@@ -1,5 +1,7 @@
 Note: some aspects of this tutorial are a little out of date. Just browse through everything Nazeka makes available and play with it for now.
 
+See also the [non-obvious features document](https://github.com/wareya/nazeka/blob/master/extra%20features.md).
+
 # Installation
 
 Install from [Mozilla's official Firefox addons website](https://addons.mozilla.org/en-US/firefox/addon/nazeka/), or [assemble an addon package yourself (not recommended)](https://github.com/wareya/nazeka/blob/master/readme.md).