public function addCustomBrowserDetection($browserName, $uaNameToLookFor = '', $isMobile = false, $isRobot = false, $separator = '/', $uaNameFindWords = true)
    {
        if ($browserName == '') {
            return false;
        }
        if (array_key_exists($browserName, $this->_customBrowserDetection)) {
            unset($this->_customBrowserDetection[$browserName]);
        }
        if ($uaNameToLookFor == '') {
            $uaNameToLookFor = $browserName;
        }
        $this->_customBrowserDetection[$browserName] = array('uaNameToLookFor' => $uaNameToLookFor, 'isMobile' => $isMobile == true, 'isRobot' => $isRobot == true,
                                                             'separator' => $separator, 'uaNameFindWords' => $uaNameFindWords == true);
        return true;
    }