diff --git a/in/public/libnss3-tools/delete.rst b/in/public/libnss3-tools/delete.rst
index 5f6846a..ed4e2f9 100644
--- a/in/public/libnss3-tools/delete.rst
+++ b/in/public/libnss3-tools/delete.rst
@@ -1,7 +1,18 @@
 Delete
 ======
 
-.. todo:: key
+.. warning::
+
+ deletion of key removes associated certificate
+
+Key
+---
+
+.. code:: shell
+
+ certutil \
+ -d ~/.mozilla/firefox/default \
+ -F -n "Name"
 
 Certificate
 -----------