diff --git a/src/api.php b/src/api.php
index ed58b79..c8177bd 100644
--- a/src/api.php
+++ b/src/api.php
@@ -65,7 +65,7 @@ foreach (MTTExtensionLoader::loadedExtensions() as $instance) {
     if ($instance instanceof MTTHttpApiExtender) {
         $newRoutes = $instance->extendHttpApi();
         foreach ($newRoutes as $endpoint => $methods) {
-            $endpoint = '/ext/'. $instance::codename. $endpoint;
+            $endpoint = '/ext/'. $instance::bundleId. $endpoint;
             foreach ($methods as $k => &$v) {
                 $v[2] = true; // Mark extension method
             }
diff --git a/src/includes/classes.php b/src/includes/classes.php
index e31afe3..551901f 100644
--- a/src/includes/classes.php
+++ b/src/includes/classes.php
@@ -73,7 +73,7 @@ abstract class ApiController
 
 abstract class MTTExtension
 {
-    const codename = '';
+    const bundleId = '';
     const title = '';
     abstract function init();
 }
@@ -120,11 +120,11 @@ class MTTExtensionLoader
         }
 
         $className = get_class($instance);
-        if (!defined("$className::codename") || !defined("$className::title")) {
-            throw new Exception("Failed to register extension '$ext': require class constants (codename, title)");
+        if (!defined("$className::bundleId") || !defined("$className::title")) {
+            throw new Exception("Failed to register extension '$ext': require class constants (bundleId, title)");
         }
-        if ($instance::codename != $ext) {
-            throw new Exception("Extension '$ext' codename does not conforms to extension dir");
+        if ($instance::bundleId != $ext) {
+            throw new Exception("Extension '$ext' bundleId does not conforms to extension dir");
         }
 
         $instance->init();
@@ -151,10 +151,23 @@ class MTTExtensionLoader
         $a = [];
         $files = array_diff(scandir(MTT_EXT) ?? [], ['.', '..']);
         foreach ($files as $ext) {
-            if ( !is_dir(MTT_EXT. $ext) || !file_exists(MTT_EXT. $ext. '/loader.php') ) {
+            if ( !is_dir(MTT_EXT. $ext)
+                || !file_exists(MTT_EXT. $ext. '/loader.php')
+                || !file_exists(MTT_EXT. $ext. '/extension.json') ) {
                 continue;
             }
-            $a[] = $ext;
+            $jsonData = file_get_contents(MTT_EXT. $ext. '/extension.json');
+            if ($jsonData === false) {
+                continue;
+            }
+            $meta = json_decode($jsonData, true);
+            if (!is_array($meta) || !isset($meta['bundleId']) || !isset($meta['title']) || !isset($meta['description'])) {
+                continue;
+            }
+            if (!is_string($meta['bundleId']) || !is_string($meta['title']) || !is_string($meta['description'])) {
+                continue;
+            }
+            $a[$ext] = $meta;
         }
         return $a;
     }
diff --git a/src/settings.php b/src/settings.php
index bc3f10c..486b3c9 100644
--- a/src/settings.php
+++ b/src/settings.php
@@ -72,7 +72,8 @@ else if (isset($_POST['activate']))
     $activate = (int)_post('activate');
     $ext = _post('ext');
 
-    $exts = MTTExtensionLoader::bundles();
+    $extBundles = MTTExtensionLoader::bundles();
+    $exts = array_keys($extBundles);
     $a = Config::get('extensions');
     if (!is_array($a)) $a = [];
 
@@ -189,11 +190,11 @@ function timezoneIdentifiers()
 
 function listExtensions()
 {
-    $exts = MTTExtensionLoader::bundles();
+    $extBundles = MTTExtensionLoader::bundles();
     $activatedExts = Config::get('extensions');
     if (!is_array($activatedExts)) $activatedExts = [];
-    foreach ($exts as $ext) {
-        $out = "$ext ";
+    foreach ($extBundles as $ext => $meta) {
+        $out = htmlspecialchars($meta['title']). ' ';
         if (in_array($ext, $activatedExts)) {
             $out .= "<a href='#' data-settings-link='ext-deactivate' data-ext='". htmlspecialchars($ext).  "'>". __('set_deactivate', true). '</a>';
             $instance = MTTExtensionLoader::extensionInstance($ext);