diff --git a/options.html b/options.html
index 7e4bfd9cb..6929ae359 100644
--- a/options.html
+++ b/options.html
@@ -4298,6 +4298,11 @@ list of string</p><p><span class="emphasis"><em>Default:</em></span>
 ]
 </pre><p><span class="emphasis"><em>Declared by:</em></span></p><table border="0" summary="Simple list" class="simplelist"><tr><td><code class="filename"><a class="filename" href="https://github.com/nix-community/home-manager/blob/master/modules/programs/firefox.nix" target="_top">
 &lt;home-manager/modules/programs/firefox.nix&gt;
+</a></code></td></tr></table></dd><dt><span class="term"><a id="opt-programs.firefox.profiles._name_.search.privateDefault"></a><a class="term" href="options.html#opt-programs.firefox.profiles._name_.search.privateDefault"><code class="option">programs.firefox.profiles.&lt;name&gt;.search.privateDefault</code></a></span></dt><dd><p>The default search engine used in the Private Browsing.</p><p><span class="emphasis"><em>Type:</em></span>
+null or string</p><p><span class="emphasis"><em>Default:</em></span>
+<code class="literal">null</code></p><p><span class="emphasis"><em>Example:</em></span>
+<code class="literal">"DuckDuckGo"</code></p><p><span class="emphasis"><em>Declared by:</em></span></p><table border="0" summary="Simple list" class="simplelist"><tr><td><code class="filename"><a class="filename" href="https://github.com/nix-community/home-manager/blob/master/modules/programs/firefox.nix" target="_top">
+&lt;home-manager/modules/programs/firefox.nix&gt;
 </a></code></td></tr></table></dd><dt><span class="term"><a id="opt-programs.firefox.profiles._name_.settings"></a><a class="term" href="options.html#opt-programs.firefox.profiles._name_.settings"><code class="option">programs.firefox.profiles.&lt;name&gt;.settings</code></a></span></dt><dd><p>Attribute set of Firefox preferences.</p><p>Firefox only supports int, bool, and string types for
 preferences, but home-manager will automatically
 convert all other JSON-compatible values into strings.</p><p><span class="emphasis"><em>Type:</em></span>