diff --git a/src/browsermanager.cpp b/src/browsermanager.cpp
index 8002105..33b5556 100644
--- a/src/browsermanager.cpp
+++ b/src/browsermanager.cpp
@@ -1,121 +1,121 @@
 /***************************************************************************
  *   Copyright 2014 Sebastian Kügler <sebas@kde.org>                       *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the                         *
  *   Free Software Foundation, Inc.,                                       *
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
  ***************************************************************************/
 
 #include "browsermanager.h"
 
 #include <QDebug>
 #include <QUrl>
 #include <QSettings>
 
 
 using namespace AngelFish;
 
 BrowserManager::BrowserManager(QObject *parent)
     : QObject(parent),
       m_bookmarks(nullptr),
       m_history(nullptr),
       m_settings(new QSettings)
 {
 }
 
 BrowserManager::~BrowserManager()
 {
     history()->save();
     bookmarks()->save();
     delete m_settings;
 }
 
 void BrowserManager::reload()
 {
     qDebug() << "BookmarksManager::reload()";
 }
 
 UrlModel* BrowserManager::bookmarks()
 {
 //     qDebug() << "BookmarksManager::bookmarks()";
     if (!m_bookmarks) {
         m_bookmarks = new UrlModel(QStringLiteral("bookmarks.json"), this);
         m_bookmarks->load();
     }
     return m_bookmarks;
 }
 
 UrlModel* BrowserManager::history()
 {
 //     qDebug() << "BrowserManager::history()";
     if (!m_history) {
         m_history = new UrlModel(QStringLiteral("history.json"), this);
         m_history->load();
     }
     return m_history;
 }
 
 void BrowserManager::addBookmark(const QVariantMap& bookmarkdata)
 {
     qDebug() << "Add bookmark";
     qDebug() << "      data: " << bookmarkdata;
     bookmarks()->add(QJsonObject::fromVariantMap(bookmarkdata));
 }
 
 void BrowserManager::removeBookmark(const QString& url)
 {
     bookmarks()->remove(url);
 }
 
 void BrowserManager::addToHistory(const QVariantMap& pagedata)
 {
 //     qDebug() << "Add History";
 //     qDebug() << "      data: " << pagedata;
     history()->add(QJsonObject::fromVariantMap(pagedata));
     emit historyChanged();
 }
 
 void BrowserManager::removeFromHistory(const QString& url)
 {
     history()->remove(url);
     emit historyChanged();
 }
 
 QString BrowserManager::urlFromUserInput(const QString& input)
 {
     QUrl url = QUrl::fromUserInput(input);
     return url.toString();
 }
 
-void BrowserManager::setHomepage(const QString homepage)
+void BrowserManager::setHomepage(const QString& homepage)
 {
     m_settings->setValue("browser/homepage", homepage);
     emit homepageChanged();
 }
 
 QString BrowserManager::homepage()
 {
     return m_settings->value("browser/homepage", "https://searx.me").toString();
 }
 
-void BrowserManager::setSearchBaseUrl(const QString searchBaseUrl)
+void BrowserManager::setSearchBaseUrl(const QString& searchBaseUrl)
 {
     m_settings->setValue("browser/searchBaseUrl", searchBaseUrl);
     emit searchBaseUrlChanged();
 }
 
 QString BrowserManager::searchBaseUrl()
 {
     return m_settings->value("browser/searchBaseUrl", "https://searx.me/?q=").toString();
 }
diff --git a/src/browsermanager.h b/src/browsermanager.h
index 50f28c2..a33ac36 100644
--- a/src/browsermanager.h
+++ b/src/browsermanager.h
@@ -1,91 +1,91 @@
 /***************************************************************************
  *                                                                         *
  *   Copyright 2014 Sebastian Kügler <sebas@kde.org>                       *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the                         *
  *   Free Software Foundation, Inc.,                                       *
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef BOOKMARKSMANAGER_H
 #define BOOKMARKSMANAGER_H
 
 #include <QObject>
 #include <QQmlPropertyMap>
 
 #include "urlmodel.h"
 
 class QSettings;
 
 namespace AngelFish {
 /**
  * @class BookmarksManager
  * @short Access to Bookmarks and History. This is a singleton for
  * administration and access to the various models and browser-internal
  * data.
  */
 class BrowserManager : public QObject
 {
     Q_OBJECT
 
     Q_PROPERTY(QAbstractListModel* bookmarks READ bookmarks NOTIFY bookmarksChanged)
     Q_PROPERTY(QAbstractListModel* history READ history NOTIFY historyChanged)
 
     Q_PROPERTY(QString homepage READ homepage WRITE setHomepage NOTIFY homepageChanged)
     Q_PROPERTY(QString searchBaseUrl READ searchBaseUrl WRITE setSearchBaseUrl NOTIFY searchBaseUrlChanged)
 
 public:
 
     BrowserManager(QObject *parent = nullptr);
     ~BrowserManager();
 
     UrlModel* bookmarks();
     UrlModel* history();
 
     QString homepage();
     QString searchBaseUrl();
 
     Q_INVOKABLE static QString urlFromUserInput(const QString &input);
 
 signals:
     void updated();
     void bookmarksChanged();
     void historyChanged();
 
     void homepageChanged();
     void searchBaseUrlChanged();
 
 public slots:
     void reload();
 
     void addBookmark(const QVariantMap &bookmarkdata);
     void removeBookmark(const QString &url);
 
     void addToHistory(const QVariantMap &pagedata);
     void removeFromHistory(const QString &url);
 
-    void setHomepage(const QString homepage);
-    void setSearchBaseUrl(const QString searchBaseUrl);
+    void setHomepage(const QString& homepage);
+    void setSearchBaseUrl(const QString& searchBaseUrl);
 
 private:
 
     UrlModel* m_bookmarks;
     UrlModel* m_history;
     QSettings* m_settings;
 };
 
 } // namespace
 
 #endif //BOOKMARKSMANAGER_H