diff --git a/in/index.rst b/in/index.rst
index 2890602..8bf8de4 100644
--- a/in/index.rst
+++ b/in/index.rst
@@ -4,6 +4,7 @@ RTFD
 .. toctree::
    :maxdepth: 2
 
+   public/firefox/index
    public/archives/index
    public/code/index
    public/containers/index
diff --git a/in/public/firefox/import_certificate_from_web_page.rst b/in/public/firefox/import_certificate_from_web_page.rst
new file mode 100644
index 0000000..0d6845d
--- /dev/null
+++ b/in/public/firefox/import_certificate_from_web_page.rst
@@ -0,0 +1,18 @@
+Import certificate from web page
+================================
+
+Set the web server's MIME types
+
+CA certificate
+--------------
+
+::
+
+ application/x-x509-ca-cert   crt der pem;
+
+Client certificate
+------------------
+
+::
+
+ application/x-x509-user-cert p12 pfx;
diff --git a/in/public/firefox/index.rst b/in/public/firefox/index.rst
new file mode 100644
index 0000000..00ae233
--- /dev/null
+++ b/in/public/firefox/index.rst
@@ -0,0 +1,6 @@
+FireFox
+=======
+
+.. toctree::
+
+   import_certificate_from_web_page