diff --git a/CHANGELOG.md b/CHANGELOG.md
index ccca3f170..e95ce6989 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,8 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [5.0.0-rc2] - 2023-11-11
+### Fixed
+- The {debug} tag was broken in v5 [#922](https://github.com/smarty-php/smarty/issues/922)
 
+## [5.0.0-rc2] - 2023-11-11
 
 ### Fixed
 - Registered output filters wouldn't run [#899](https://github.com/smarty-php/smarty/issues/899)
diff --git a/src/Debug.php b/src/Debug.php
index 9d2bf9b1e..ab1a88779 100644
--- a/src/Debug.php
+++ b/src/Debug.php
@@ -6,16 +6,7 @@
  * Smarty Internal Plugin Debug
  * Class to collect data for the Smarty Debugging Console
  *
-
-
  * @author     Uwe Tews
- */
-
-/**
- * Smarty Internal Plugin Debug Class
- *
-
-
  */
 class Debug extends Data
 {
@@ -24,14 +15,14 @@ class Debug extends Data
      *
      * @var array
      */
-    public $template_data = array();
+    public $template_data = [];
 
     /**
      * List of uid's which shall be ignored
      *
      * @var array
      */
-    public $ignore_uid = array();
+    public $ignore_uid = [];
 
     /**
      * Index of display() and fetch() calls
@@ -50,10 +41,10 @@ class Debug extends Data
     /**
      * Start logging template
      *
-     * @param \Smarty\Template $template template
+     * @param Template $template template
      * @param null                      $mode     true: display   false: fetch  null: subtemplate
      */
-    public function start_template(\Smarty\Template $template, $mode = null)
+    public function start_template(Template $template, $mode = null)
     {
         if (isset($mode) && !$template->_isSubTpl()) {
             $this->index++;
@@ -67,9 +58,9 @@ public function start_template(\Smarty\Template $template, $mode = null)
     /**
      * End logging of cache time
      *
-     * @param \Smarty\Template $template cached template
+     * @param Template $template cached template
      */
-    public function end_template(\Smarty\Template $template)
+    public function end_template(Template $template)
     {
         $key = $this->get_key($template);
         $this->template_data[ $this->index ][ $key ][ 'total_time' ] +=
@@ -79,15 +70,15 @@ public function end_template(\Smarty\Template $template)
     /**
      * Start logging of compile time
      *
-     * @param \Smarty\Template $template
+     * @param Template $template
      */
-    public function start_compile(\Smarty\Template $template)
+    public function start_compile(Template $template)
     {
         static $_is_stringy = array('string' => true, 'eval' => true);
         if (!empty($template->getCompiler()->trace_uid)) {
             $key = $template->getCompiler()->trace_uid;
             if (!isset($this->template_data[ $this->index ][ $key ])) {
-	            $this->saveTemplateData($_is_stringy, $template, $key);
+                $this->saveTemplateData($_is_stringy, $template, $key);
             }
         } else {
             if (isset($this->ignore_uid[ $template->getSource()->uid ])) {
@@ -101,9 +92,9 @@ public function start_compile(\Smarty\Template $template)
     /**
      * End logging of compile time
      *
-     * @param \Smarty\Template $template
+     * @param Template $template
      */
-    public function end_compile(\Smarty\Template $template)
+    public function end_compile(Template $template)
     {
         if (!empty($template->getCompiler()->trace_uid)) {
             $key = $template->getCompiler()->trace_uid;
@@ -120,9 +111,9 @@ public function end_compile(\Smarty\Template $template)
     /**
      * Start logging of render time
      *
-     * @param \Smarty\Template $template
+     * @param Template $template
      */
-    public function start_render(\Smarty\Template $template)
+    public function start_render(Template $template)
     {
         $key = $this->get_key($template);
         $this->template_data[ $this->index ][ $key ][ 'start_time' ] = microtime(true);
@@ -131,9 +122,9 @@ public function start_render(\Smarty\Template $template)
     /**
      * End logging of compile time
      *
-     * @param \Smarty\Template $template
+     * @param Template $template
      */
-    public function end_render(\Smarty\Template $template)
+    public function end_render(Template $template)
     {
         $key = $this->get_key($template);
         $this->template_data[ $this->index ][ $key ][ 'render_time' ] +=
@@ -143,9 +134,9 @@ public function end_render(\Smarty\Template $template)
     /**
      * Start logging of cache time
      *
-     * @param \Smarty\Template $template cached template
+     * @param Template $template cached template
      */
-    public function start_cache(\Smarty\Template $template)
+    public function start_cache(Template $template)
     {
         $key = $this->get_key($template);
         $this->template_data[ $this->index ][ $key ][ 'start_time' ] = microtime(true);
@@ -154,9 +145,9 @@ public function start_cache(\Smarty\Template $template)
     /**
      * End logging of cache time
      *
-     * @param \Smarty\Template $template cached template
+     * @param Template $template cached template
      */
-    public function end_cache(\Smarty\Template $template)
+    public function end_cache(Template $template)
     {
         $key = $this->get_key($template);
         $this->template_data[ $this->index ][ $key ][ 'cache_time' ] +=
@@ -166,9 +157,9 @@ public function end_cache(\Smarty\Template $template)
     /**
      * Register template object
      *
-     * @param \Smarty\Template $template cached template
+     * @param Template $template cached template
      */
-    public function register_template(\Smarty\Template $template)
+    public function register_template(Template $template)
     {
     }
 
@@ -184,13 +175,13 @@ public static function register_data(Data $data)
     /**
      * Opens a window for the Smarty Debugging Console and display the data
      *
-     * @param \Smarty\Template|\Smarty $obj object to debug
+     * @param Template|Smarty $obj object to debug
      * @param bool                            $full
      *
      * @throws \Exception
-     * @throws \Smarty\Exception
+     * @throws Exception
      */
-    public function display_debug($obj, $full = false)
+    public function display_debug($obj, bool $full = false)
     {
         if (!$full) {
             $this->offset++;
@@ -200,18 +191,18 @@ public function display_debug($obj, $full = false)
         $smarty = $obj->getSmarty();
         // create fresh instance of smarty for displaying the debug console
         // to avoid problems if the application did overload the Smarty class
-        $debObj = new \Smarty\Smarty();
+        $debObj = new Smarty();
         // copy the working dirs from application
         $debObj->setCompileDir($smarty->getCompileDir());
-        $debObj->compile_check = \Smarty::COMPILECHECK_ON;
+        $debObj->compile_check = Smarty::COMPILECHECK_ON;
         $debObj->security_policy = null;
         $debObj->debugging = false;
         $debObj->debugging_ctrl = 'NONE';
         $debObj->error_reporting = E_ALL & ~E_NOTICE;
-        $debObj->debug_tpl = $smarty->debug_tpl ?? 'file:' . __DIR__ . '/../debug.tpl';
+        $debObj->debug_tpl = $smarty->debug_tpl ?? 'file:' . __DIR__ . '/debug.tpl';
         $debObj->registered_resources = array();
         $debObj->escape_html = true;
-        $debObj->caching = \Smarty::CACHING_OFF;
+        $debObj->caching = Smarty::CACHING_OFF;
         // prepare information of assigned variables
         $ptr = $this->get_debug_vars($obj);
         $_assigned_vars = $ptr->tpl_vars;
@@ -223,7 +214,7 @@ public function display_debug($obj, $full = false)
         $displayMode = $debugging === 2 || !$full;
         $offset = $this->offset * 50;
         $_template = $debObj->doCreateTemplate($debObj->debug_tpl);
-        if ($obj instanceof \Smarty\Template) {
+        if ($obj instanceof Template) {
             $_template->assign('template_name', $templateName);
         } elseif ($obj instanceof Smarty || $full) {
             $_template->assign('template_data', $this->template_data[$this->index]);
@@ -298,11 +289,11 @@ private function get_debug_vars($obj)
     /**
      * Return key into $template_data for template
      *
-     * @param \Smarty\Template $template template object
+     * @param Template $template template object
      *
      * @return string key into $template_data
      */
-    private function get_key(\Smarty\Template $template)
+    private function get_key(Template $template)
     {
         static $_is_stringy = array('string' => true, 'eval' => true);
 
@@ -319,9 +310,9 @@ private function get_key(\Smarty\Template $template)
     /**
      * Ignore template
      *
-     * @param \Smarty\Template $template
+     * @param Template $template
      */
-    public function ignore(\Smarty\Template $template)
+    public function ignore(Template $template)
     {
         $this->ignore_uid[$template->getSource()->uid] = true;
     }
@@ -329,9 +320,9 @@ public function ignore(\Smarty\Template $template)
     /**
      * handle 'URL' debugging mode
      *
-     * @param \Smarty $smarty
+     * @param Smarty $smarty
      */
-    public function debugUrl(\Smarty $smarty)
+    public function debugUrl(Smarty $smarty)
     {
         if (isset($_SERVER[ 'QUERY_STRING' ])) {
             $_query_string = $_SERVER[ 'QUERY_STRING' ];
@@ -360,12 +351,12 @@ public function debugUrl(\Smarty $smarty)
 
 	/**
 	 * @param array $_is_stringy
-	 * @param \Smarty\Template $template
+	 * @param Template $template
 	 * @param string $key
 	 *
 	 * @return void
 	 */
-	private function saveTemplateData(array $_is_stringy, \Smarty\Template $template, string $key): void {
+	private function saveTemplateData(array $_is_stringy, Template $template, string $key): void {
 		if (isset($_is_stringy[$template->getSource()->type])) {
 			$this->template_data[$this->index][$key]['name'] =
 				'\'' . substr($template->getSource()->name, 0, 25) . '...\'';
diff --git a/src/Smarty.php b/src/Smarty.php
index 9b8738be1..b40cd8d26 100644
--- a/src/Smarty.php
+++ b/src/Smarty.php
@@ -251,9 +251,10 @@ class Smarty extends \Smarty\TemplateBase {
 
 	/**
 	 * debug mode
-	 * Setting this to true enables the debug-console.
+	 * Setting this to true enables the debug-console. Setting it to 2 enables individual Debug Console window by
+	 * template name.
 	 *
-	 * @var boolean
+	 * @var boolean|int
 	 */
 	public $debugging = false;
 
diff --git a/src/debug.tpl b/src/debug.tpl
index cd9325668..07b8e38ed 100644
--- a/src/debug.tpl
+++ b/src/debug.tpl
@@ -1,4 +1,4 @@
-{capture name='_smarty_debug' assign=debug_output}
+{capture name='_smarty_debug' assign='debug_output'}
     <!DOCTYPE html>
     <html lang="en">
     <head>
@@ -108,7 +108,7 @@
     </head>
     <body>
 
-    <h1>Smarty {Smarty::SMARTY_VERSION} Debug Console
+    <h1>Smarty {\Smarty\Smarty::SMARTY_VERSION} Debug Console
         -  {if isset($template_name)}{$template_name|debug_print_var nofilter} {/if}{if !empty($template_data)}Total Time {$execution_time|string_format:"%.5f"}{/if}</h1>
 
     {if !empty($template_data)}
@@ -166,7 +166,7 @@
     </body>
     </html>
 {/capture}
-<script type="text/javascript">
+<script>
     _smarty_console = window.open("", "console{$targetWindow}", "width=1024,height=600,left={$offset},top={$offset},resizable,scrollbars=yes");
     _smarty_console.document.write("{$debug_output|escape:'javascript' nofilter}");
     _smarty_console.document.close();
diff --git a/tests/UnitTests/TemplateSource/TagTests/Debug/DebugTest.php b/tests/UnitTests/TemplateSource/TagTests/Debug/DebugTest.php
new file mode 100644
index 000000000..96064912f
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/TagTests/Debug/DebugTest.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace UnitTests\TemplateSource\TagTests\Debug;
+use PHPUnit_Smarty;
+use Smarty\Smarty;
+
+/**
+ * Smarty PHPunit tests of {debug} tag
+ */
+class PluginModifierStripTagsTest extends PHPUnit_Smarty {
+
+	public function setUp(): void {
+		$this->setUpSmarty(__DIR__);
+	}
+	public function testDefault() {
+		$tpl = $this->smarty->createTemplate('eval:{debug}');
+		$output = $this->smarty->fetch($tpl);
+		$this->assertStringContainsString("<script", $output);
+		$this->assertStringContainsString("</script>", $output);
+	}
+
+}