diff --git a/site/source/misc-guides/ca-ff.rst b/site/source/misc-guides/ca-ff.rst
index e4fe1f6..da4e80b 100644
--- a/site/source/misc-guides/ca-ff.rst
+++ b/site/source/misc-guides/ca-ff.rst
@@ -4,6 +4,8 @@
 Configuring Firefox to Respect Your Root CA
 ===========================================
 
+Choose your operating system from among the tabs below:
+
 .. tabs::
 
     .. group-tab:: Mac/Windows