This project extent from ZFDebug (http://code.google.com/p/zfdebug/);
You must first install firebug (http://getfirebug.com/) in your firefox
Then install firephp (http://www.firephp.org/) in your firefox
Then copy "ZFirebug" Folder in your library path.

Then define initilize method in your bootstrap file

protected function _initZFirebug()
	{
		$autoloader = Zend_Loader_Autoloader::getInstance();
		$autoloader->registerNamespace('ZFirebug');

		$options = array(
        'plugins' => array("Variables",
							'File',
							'Html',
							'Memory', 
							'Time', 
							'Registry', 
							'Auth')
		);

		$debug = new ZFirebug_Controller_Plugin_Debug($options);

		$this->bootstrap('frontController');
		$frontController = $this->getResource('frontController');
		$frontController->registerPlugin($debug);

	}