diff --git a/mediawiki/README.md b/mediawiki/README.md
index 25ffd27..f134e4c 100644
--- a/mediawiki/README.md
+++ b/mediawiki/README.md
@@ -130,6 +130,14 @@ MediaWiki is one of the most famous wiki engines. It's best known for being used
         <td>Allows users to edit wiki anonymously (<code>true</code> and <code>false</code>)</td>
         <td><code>true</code></td>
     </tr>
+    <tr>
+        <th colspan="3">MobileFrontend</th>
+    </tr>
+    <tr>
+        <td>COLLAPSE_SECTIONS_BY_DEFAULT</td>
+        <td>Controls whether to collapse sections by default (<code>true</code> and <code>false</code>)</td>
+        <td><code>false</code></td>
+    </tr>
 </table>
 
 ## How to create an administrator
diff --git a/mediawiki/config/LocalSettings.php b/mediawiki/config/LocalSettings.php
index 29bd515..0646197 100644
--- a/mediawiki/config/LocalSettings.php
+++ b/mediawiki/config/LocalSettings.php
@@ -154,6 +154,8 @@
 // that $wgVirtualRestConfig['modules']['parsoid']['url'] be pointed to localhost if this setting is enabled.
 $wgVirtualRestConfig['modules']['parsoid']['forwardCookies'] = true;
 
+$wgMFCollapseSectionsByDefault = COLLAPSE_SECTIONS_BY_DEFAULT;
+
 $wgMFDefaultSkinClass = 'SkinVector';
 
 $wgCollectionFormats = array(
diff --git a/mediawiki/docker-entrypoint.sh b/mediawiki/docker-entrypoint.sh
index d76e080..09359f8 100755
--- a/mediawiki/docker-entrypoint.sh
+++ b/mediawiki/docker-entrypoint.sh
@@ -31,6 +31,8 @@ ALLOW_ANONYMOUS_READING=${ALLOW_ANONYMOUS_READING:=false}
 
 ALLOW_ANONYMOUS_EDITING=${ALLOW_ANONYMOUS_EDITING:=true}
 
+COLLAPSE_SECTIONS_BY_DEFAULT=${COLLAPSE_SECTIONS_BY_DEFAULT:=false}
+
 METRIC_COUNTER=${METRIC_COUNTER:=""}
 
 CREDENTIALS=${CREDENTIALS:=""}
@@ -95,6 +97,7 @@ substitute ALLOW_ACCOUNT_CREATION
 substitute ALLOW_ACCOUNT_EDITING
 substitute ALLOW_ANONYMOUS_READING
 substitute ALLOW_ANONYMOUS_EDITING
+substitute COLLAPSE_SECTIONS_BY_DEFAULT
 substitute RENDER_SERVER
 substitute CREDENTIALS
 substitute METRIC_COUNTER