diff --git a/options.xhtml b/options.xhtml
index bcce6e515..761ca3d29 100644
--- a/options.xhtml
+++ b/options.xhtml
@@ -18962,6 +18962,39 @@ null or package</p>
 <p><span class="emphasis"><em>Type:</em></span>
 null or package <span class="emphasis"><em>(read only)</em></span></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.languagePacks"></a><a class="term" href="options.xhtml#opt-programs.firefox.languagePacks"><code class="option">programs.firefox.languagePacks</code>
+  </a>
+ </span>
+</dt>
+<dd>
+<p>The language packs to install. Available language codes can be found
+on the releases page:
+<code class="literal">https://releases.mozilla.org/pub/firefox/releases/${version}/linux-x86_64/xpi/</code>,
+replacing <code class="literal">${version}</code> with the version of Firefox you have.</p>
+
+<p><span class="emphasis"><em>Type:</em></span>
+list of string</p>
+
+<p><span class="emphasis"><em>Default:</em></span>
+<code class="literal">[ ]</code></p>
+
+<p><span class="emphasis"><em>Example:</em></span></p><pre><code class="programlisting">[
+  &quot;en-GB&quot;
+  &quot;de&quot;
+]
+</code></pre>
+
 <p><span class="emphasis"><em>Declared by:</em></span></p>
 <table border="0" summary="Simple list" class="simplelist">
 <tr><td>