diff --git a/resources/desktop/com.github.rssguard.appdata.xml b/resources/desktop/com.github.rssguard.appdata.xml
index 691e8ba03..33f5b23b6 100644
--- a/resources/desktop/com.github.rssguard.appdata.xml
+++ b/resources/desktop/com.github.rssguard.appdata.xml
@@ -26,7 +26,7 @@
   <url type="donation">https://github.com/sponsors/martinrotter</url>
   <content_rating type="oars-1.1" />
   <releases>
-    <release version="4.2.1" date="2022-04-01"/>
+    <release version="4.2.1" date="2022-04-04"/>
   </releases>
   <content_rating type="oars-1.0">
     <content_attribute id="violence-cartoon">none</content_attribute>
diff --git a/src/librssguard/gui/webbrowser.cpp b/src/librssguard/gui/webbrowser.cpp
index 6c5269346..28503e48d 100644
--- a/src/librssguard/gui/webbrowser.cpp
+++ b/src/librssguard/gui/webbrowser.cpp
@@ -91,13 +91,7 @@ void WebBrowser::setHtml(const QString& html, const QUrl& base_url) {
   m_webView->setHtml(html, base_url);
 }
 
-WebBrowser::~WebBrowser() {
-  //m_toolBar->removeAction(m_txtLocationAction);
-  //m_toolBar->removeAction(m_btnDiscoverFeedsAction);
-
-  // Delete members. Do not use scoped pointers here.
-  //delete m_layout;
-}
+WebBrowser::~WebBrowser() {}
 
 double WebBrowser::verticalScrollBarPosition() const {
   return m_webView->verticalScrollBarPosition();
@@ -284,9 +278,9 @@ void WebBrowser::initializeLayout() {
   m_actionOpenInSystemBrowser->setEnabled(false);
   m_actionReadabilePage->setEnabled(false);
 
-  m_btnDiscoverFeedsAction->setDefaultWidget(new QWidget(this));
+  //m_btnDiscoverFeedsAction->setDefaultWidget(new QWidget(this));
 
-  //m_btnDiscoverFeedsAction->setDefaultWidget(m_btnDiscoverFeeds);
+  m_btnDiscoverFeedsAction->setDefaultWidget(m_btnDiscoverFeeds);
 
   // Add needed actions into toolbar.
   m_toolBar->addAction(m_actionBack);
@@ -296,8 +290,8 @@ void WebBrowser::initializeLayout() {
   m_toolBar->addAction(m_actionOpenInSystemBrowser);
   m_toolBar->addAction(m_actionReadabilePage);
 
-  //m_toolBar->addAction(m_btnDiscoverFeedsAction);
-  //m_txtLocationAction = m_toolBar->addWidget(m_txtLocation);
+  m_toolBar->addAction(m_btnDiscoverFeedsAction);
+  m_txtLocationAction = m_toolBar->addWidget(m_txtLocation);
 
   m_loadingProgress = new QProgressBar(this);
   m_loadingProgress->setFixedHeight(10);
diff --git a/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.cpp b/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.cpp
index e63dc5ef0..1295f6e76 100644
--- a/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.cpp
+++ b/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.cpp
@@ -150,29 +150,13 @@ void LiteHtmlViewer::applyFont(const QFont& fon) {
   QLiteHtmlWidget::setDefaultFont(fon);
 }
 
-bool LiteHtmlViewer::canZoomIn() const {
-  return zoomFactor() <= double(MAX_ZOOM_FACTOR) - double(ZOOM_FACTOR_STEP);
-}
-
-bool LiteHtmlViewer::canZoomOut() const {
-  return zoomFactor() >= double(MIN_ZOOM_FACTOR) + double(ZOOM_FACTOR_STEP);
-}
-
 qreal LiteHtmlViewer::zoomFactor() const {
   return QLiteHtmlWidget::zoomFactor();
 }
 
-void LiteHtmlViewer::zoomIn() {
-  setZoomFactor(zoomFactor() + double(ZOOM_FACTOR_STEP));
-}
-
-void LiteHtmlViewer::zoomOut() {
-  setZoomFactor(zoomFactor() - double(ZOOM_FACTOR_STEP));
-}
-
 void LiteHtmlViewer::setZoomFactor(qreal zoom_factor) {
   if (zoom_factor == 0.0) {
-    QLiteHtmlWidget::setZoomFactor(0.1);
+    QLiteHtmlWidget::setZoomFactor(MIN_ZOOM_FACTOR);
   }
   else {
     QLiteHtmlWidget::setZoomFactor(zoom_factor);
diff --git a/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.h b/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.h
index d1c76ea4d..c5db891d5 100644
--- a/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.h
+++ b/src/librssguard/gui/webviewers/litehtml/litehtmlviewer.h
@@ -30,11 +30,7 @@ class LiteHtmlViewer : public QLiteHtmlWidget, public WebViewer {
     virtual double verticalScrollBarPosition() const;
     virtual void setVerticalScrollBarPosition(double pos);
     virtual void applyFont(const QFont& fon);
-    virtual bool canZoomIn() const;
-    virtual bool canZoomOut() const;
     virtual qreal zoomFactor() const;
-    virtual void zoomIn();
-    virtual void zoomOut();
     virtual void setZoomFactor(qreal zoom_factor);
 
   private slots:
diff --git a/src/librssguard/gui/webviewers/webengine/webengineviewer.cpp b/src/librssguard/gui/webviewers/webengine/webengineviewer.cpp
index a9a73f68c..3d3ae13f9 100644
--- a/src/librssguard/gui/webviewers/webengine/webengineviewer.cpp
+++ b/src/librssguard/gui/webviewers/webengine/webengineviewer.cpp
@@ -221,26 +221,10 @@ void WebEngineViewer::applyFont(const QFont& fon) {
   QWebEngineProfile::defaultProfile()->settings()->setFontSize(QWebEngineSettings::DefaultFontSize, pixel_size);
 }
 
-bool WebEngineViewer::canZoomIn() const {
-  return zoomFactor() <= double(MAX_ZOOM_FACTOR) - double(ZOOM_FACTOR_STEP);
-}
-
-bool WebEngineViewer::canZoomOut() const {
-  return zoomFactor() >= double(MIN_ZOOM_FACTOR) + double(ZOOM_FACTOR_STEP);
-}
-
 qreal WebEngineViewer::zoomFactor() const {
   return QWebEngineView::zoomFactor();
 }
 
-void WebEngineViewer::zoomIn() {
-  setZoomFactor(zoomFactor() + double(ZOOM_FACTOR_STEP));
-}
-
-void WebEngineViewer::zoomOut() {
-  setZoomFactor(zoomFactor() - double(ZOOM_FACTOR_STEP));
-}
-
 void WebEngineViewer::setZoomFactor(qreal zoom_factor) {
   QWebEngineView::setZoomFactor(zoom_factor);
 }
diff --git a/src/librssguard/gui/webviewers/webengine/webengineviewer.h b/src/librssguard/gui/webviewers/webengine/webengineviewer.h
index 28397fc77..78ff7d275 100644
--- a/src/librssguard/gui/webviewers/webengine/webengineviewer.h
+++ b/src/librssguard/gui/webviewers/webengine/webengineviewer.h
@@ -32,11 +32,7 @@ class WebEngineViewer : public QWebEngineView, public WebViewer {
     virtual double verticalScrollBarPosition() const;
     virtual void setVerticalScrollBarPosition(double pos);
     virtual void applyFont(const QFont& fon);
-    virtual bool canZoomIn() const;
-    virtual bool canZoomOut() const;
     virtual qreal zoomFactor() const;
-    virtual void zoomIn();
-    virtual void zoomOut();
     virtual void setZoomFactor(qreal zoom_factor);
     virtual QString html() const;
     virtual QUrl url() const;
diff --git a/src/librssguard/gui/webviewers/webviewer.h b/src/librssguard/gui/webviewers/webviewer.h
index c5f796390..0e94590c8 100644
--- a/src/librssguard/gui/webviewers/webviewer.h
+++ b/src/librssguard/gui/webviewers/webviewer.h
@@ -51,14 +51,30 @@ class WebViewer {
     virtual void applyFont(const QFont& fon) = 0;
 
     // Zooming.
-    virtual bool canZoomIn() const = 0;
-    virtual bool canZoomOut() const = 0;
-    virtual void zoomIn() = 0;
-    virtual void zoomOut() = 0;
+    virtual bool canZoomIn() const;
+    virtual bool canZoomOut() const;
+    virtual void zoomIn();
+    virtual void zoomOut();
     virtual qreal zoomFactor() const = 0;
     virtual void setZoomFactor(qreal zoom_factor) = 0;
 };
 
 inline WebViewer::~WebViewer() {}
 
+inline void WebViewer::zoomIn() {
+  setZoomFactor(zoomFactor() + double(ZOOM_FACTOR_STEP));
+}
+
+inline void WebViewer::zoomOut() {
+  setZoomFactor(zoomFactor() - double(ZOOM_FACTOR_STEP));
+}
+
+inline bool WebViewer::canZoomIn() const {
+  return zoomFactor() <= double(MAX_ZOOM_FACTOR) - double(ZOOM_FACTOR_STEP);
+}
+
+inline bool WebViewer::canZoomOut() const {
+  return zoomFactor() >= double(MIN_ZOOM_FACTOR) + double(ZOOM_FACTOR_STEP);
+}
+
 #endif // WEBVIEWER_H
diff --git a/src/librssguard/services/gmail/gmailserviceroot.cpp b/src/librssguard/services/gmail/gmailserviceroot.cpp
index 147e42bdf..ac30d08b2 100644
--- a/src/librssguard/services/gmail/gmailserviceroot.cpp
+++ b/src/librssguard/services/gmail/gmailserviceroot.cpp
@@ -26,9 +26,9 @@ GmailServiceRoot::GmailServiceRoot(RootItem* parent)
 }
 
 GmailServiceRoot::~GmailServiceRoot() {
-  /*if (!m_emailPreview.isNull()) {
-     m_emailPreview->deleteLater();
-     }*/
+  if (!m_emailPreview.isNull()) {
+    m_emailPreview->deleteLater();
+  }
 }
 
 void GmailServiceRoot::updateTitle() {
@@ -106,7 +106,7 @@ bool GmailServiceRoot::wantsBaggedIdsOfExistingMessages() const {
 
 CustomMessagePreviewer* GmailServiceRoot::customMessagePreviewer() {
   if (m_emailPreview.isNull()) {
-    m_emailPreview.reset(new EmailPreviewer());
+    m_emailPreview = new EmailPreviewer();
   }
 
   return m_emailPreview.data();
diff --git a/src/librssguard/services/gmail/gmailserviceroot.h b/src/librssguard/services/gmail/gmailserviceroot.h
index 5a53232ed..7d48d1dde 100644
--- a/src/librssguard/services/gmail/gmailserviceroot.h
+++ b/src/librssguard/services/gmail/gmailserviceroot.h
@@ -50,7 +50,7 @@ class GmailServiceRoot : public ServiceRoot, public CacheForServiceRoot {
     void updateTitle();
 
   private:
-    QScopedPointer<EmailPreviewer> m_emailPreview;
+    QPointer<EmailPreviewer> m_emailPreview;
     GmailNetworkFactory* m_network;
     QAction* m_actionReply;
     Message m_replyToMessage;