diff --git a/runtime/BrowserWindow.cpp b/runtime/BrowserWindow.cpp
index 12dabd4f1..482a2bd38 100644
--- a/runtime/BrowserWindow.cpp
+++ b/runtime/BrowserWindow.cpp
@@ -73,8 +73,18 @@ BrowserWindow::BrowserWindow(QString url)
     m_tabGridLayout = new QGridLayout(m_pgAdminMainTab);
     m_tabGridLayout->setContentsMargins(0, 0, 0, 0);
     m_mainWebView = new WebViewWindow(m_pgAdminMainTab);
+
 #ifdef PGADMIN4_USE_WEBENGINE
     m_mainWebView->setPage(new WebEnginePage());
+    m_mainWebView->page()->setNetworkAccessManager(m_netAccessMan);
+#else
+    m_cookieJar = new QNetworkCookieJar();
+    m_netAccessMan = new QNetworkAccessManager();
+    m_netAccessMan->setCookieJar(m_cookieJar);
+    m_mainWebView->setPage(new WebViewPage());
+    m_mainWebView->page()->setNetworkAccessManager(m_netAccessMan);
+    m_mainWebView->settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
+    m_mainWebView->settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows, true);
 #endif
 
 #ifdef PGADMIN4_DEBUG
@@ -107,6 +117,8 @@ BrowserWindow::BrowserWindow(QString url)
 #else
     // Register the slot when click on the URL link form main menu bar
     connect(m_mainWebView, SIGNAL(linkClicked(const QUrl &)),SLOT(urlLinkClicked(const QUrl &)));
+    // Register the slot when click on the URL link for QWebPage
+    connect(m_mainWebView->page(), SIGNAL(createTabWindowKit(QWebPage * &)),SLOT(createNewTabWindowKit(QWebPage * &)));
 #endif
 
     // Register the slot on tab index change
@@ -120,6 +132,7 @@ BrowserWindow::BrowserWindow(QString url)
     m_mainWebView->page()->setForwardUnsupportedContent(true);
     connect(m_mainWebView->page(), SIGNAL(downloadRequested(const QNetworkRequest &)), this, SLOT(download(const QNetworkRequest &)));
     connect(m_mainWebView->page(), SIGNAL(unsupportedContent(QNetworkReply*)), this, SLOT(unsupportedContent(QNetworkReply*)));
+    m_mainWebView->page()->setForwardUnsupportedContent(true);
     m_mainWebView->page()->setLinkDelegationPolicy(QWebPage::DelegateAllLinks);
 #endif
 
@@ -150,6 +163,13 @@ BrowserWindow::BrowserWindow(QString url)
     m_mainWebView->setUrl(m_appServerUrl);
 }
 
+// Destructor
+BrowserWindow::~BrowserWindow()
+{
+    if (m_tabWidget)
+        delete m_tabWidget;
+}
+
 // Save the window geometry on close
 void BrowserWindow::closeEvent(QCloseEvent *event)
 {
@@ -787,9 +807,9 @@ void BrowserWindow::closetabs()
 
     // If QTabWidget contains only one tab then hide the TabBar window
     if ((totalTabs - 1) < 2)
-	    m_tabWidget->tabBar()->setVisible(false);
+        m_tabWidget->tabBar()->setVisible(false);
     else
-	    m_tabWidget->tabBar()->setVisible(true);
+        m_tabWidget->tabBar()->setVisible(true);
 
     QObject *senderPtr = QObject::sender();
     if (senderPtr != NULL)
@@ -806,7 +826,24 @@ void BrowserWindow::closetabs()
 
         // free the allocated memory when the tab is closed
         if (tab != NULL)
+        {
+            QList<QWidget*> widgetList = tab->findChildren<QWidget*>();
+            foreach (QWidget* widgetPtr, widgetList)
+            {
+                if (widgetPtr != NULL)
+                {
+                    webviewPtr = dynamic_cast<WebViewWindow*>(widgetPtr);
+                    if (webviewPtr != NULL)
+                    {
+                        // Trigger the action for tab window close so unload event
+                        // will be called and resources will be freed properly.
+                        webviewPtr->page()->triggerAction(QWebPage::RequestClose);
+                    }
+                }
+            }
+
             delete tab;
+        }
 
         // Adjust the tab index value if the tab is closed in between
         for (loopCount = 1; loopCount < totalTabs; loopCount++)
@@ -905,6 +942,7 @@ void BrowserWindow::tabTitleChanged(const QString &str)
     }
 }
 
+
 void BrowserWindow::current_dir_path(const QString &dir)
 {
     m_dir = dir;
@@ -914,6 +952,72 @@ void BrowserWindow::current_dir_path(const QString &dir)
     settings.setValue("Browser/LastSaveLocation", m_last_open_folder_path);
 }
 
+#ifndef PGADMIN4_USE_WEBENGINE
+void BrowserWindow::createNewTabWindowKit(QWebPage * &p)
+{
+    m_addNewTab = new QWidget(m_tabWidget);
+    m_addNewGridLayout = new QGridLayout(m_addNewTab);
+    m_addNewGridLayout->setContentsMargins(0, 0, 0, 0);
+    m_addNewWebView = new WebViewWindow(m_addNewTab);
+    m_addNewWebView->setPage(new WebViewPage());
+    m_addNewWebView->setZoomFactor(m_mainWebView->zoomFactor());
+
+    m_addNewWebView->settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
+    m_addNewWebView->settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows, true);
+
+    m_widget = new QWidget(m_addNewTab);
+    m_toolBtnBack = new QToolButton(m_widget);
+    m_toolBtnBack->setFixedHeight(PGA_BTN_SIZE);
+    m_toolBtnBack->setFixedWidth(PGA_BTN_SIZE);
+    m_toolBtnBack->setIcon(QIcon(":/back.png"));
+    m_toolBtnBack->setToolTip(tr("Go back"));
+    m_toolBtnBack->setDisabled(true);
+
+    m_toolBtnForward = new QToolButton(m_widget);
+    m_toolBtnForward->setFixedHeight(PGA_BTN_SIZE);
+    m_toolBtnForward->setFixedWidth(PGA_BTN_SIZE);
+    m_toolBtnForward->setIcon(QIcon(":/forward.png"));
+    m_toolBtnForward->setToolTip(tr("Go forward"));
+    m_toolBtnForward->setDisabled(true);
+
+    QPushButton *m_btnClose = new QPushButton(m_widget);
+    m_btnClose->setFixedHeight(PGA_BTN_SIZE);
+    m_btnClose->setFixedWidth(PGA_BTN_SIZE);
+    m_btnClose->setIcon(QIcon(":/close.png"));
+    m_btnClose->setToolTip(tr("Close tab"));
+
+    m_horizontalLayout = new QHBoxLayout(m_widget);
+    m_horizontalLayout->setSizeConstraint(QLayout::SetMinAndMaxSize);
+    m_horizontalLayout->setSpacing(1);
+    m_horizontalLayout->addWidget(m_toolBtnBack);
+    m_horizontalLayout->addWidget(m_toolBtnForward);
+
+    // Register the slot on titleChange so set the tab text accordingly
+    connect(m_addNewWebView, SIGNAL(titleChanged(const QString &)), SLOT(tabTitleChanged(const QString &)));
+
+    // Register the slot on toolbutton to show the previous history of web
+    connect(m_toolBtnBack, SIGNAL(clicked()), this, SLOT(goBackPage()));
+
+    // Register the slot on toolbutton to show the next history of web
+    connect(m_toolBtnForward, SIGNAL(clicked()), this, SLOT(goForwardPage()));
+
+    // Register the slot on close button , added manually
+    connect(m_btnClose, SIGNAL(clicked()), SLOT(closetabs()));
+    m_addNewGridLayout->addWidget(m_addNewWebView, 0, 0, 1, 1);
+    m_tabWidget->addTab(m_addNewTab, QString());
+    m_tabWidget->tabBar()->setVisible(true);
+    m_tabWidget->setCurrentIndex((m_tabWidget->count() - 1));
+
+    // Set the back and forward button on tab
+    m_tabWidget->tabBar()->setTabButton((m_tabWidget->count() - 1), QTabBar::LeftSide, m_widget);
+    m_tabWidget->tabBar()->setTabButton((m_tabWidget->count() - 1), QTabBar::RightSide, m_btnClose);
+
+    m_addNewWebView->setTabIndex((m_tabWidget->count() - 1));
+    m_addNewWebView->page()->setNetworkAccessManager(m_netAccessMan);
+    p = m_addNewWebView->page();
+}
+#endif
+
 #ifdef PGADMIN4_USE_WEBENGINE
 // Below slot will be called when link is required to open in new tab.
 void BrowserWindow::createNewTabWindow(QWebEnginePage * &p)
diff --git a/runtime/BrowserWindow.h b/runtime/BrowserWindow.h
index 25d6beb2b..35f673645 100644
--- a/runtime/BrowserWindow.h
+++ b/runtime/BrowserWindow.h
@@ -17,19 +17,23 @@
 #include "WebViewWindow.h"
 
 #if QT_VERSION >= 0x050000
-#include <QtWidgets>
-#ifdef PGADMIN4_USE_WEBENGINE
-#include <QtWebEngineWidgets>
+    #include <QtWidgets>
+
+    #ifdef PGADMIN4_USE_WEBENGINE
+        #include <QtWebEngineWidgets>
+    #else
+        #include <QtWebKitWidgets>
+        #include <QNetworkCookieJar>
+        #include <QNetworkAccessManager>
+    #endif
 #else
-#include <QtWebKitWidgets>
-#endif
-#else
-#include <QMainWindow>
-#ifdef PGADMIN4_USE_WEBENGINE
-#include <QtWebEngineView>
-#else
-#include <QWebView>
-#endif
+    #include <QMainWindow>
+
+    #ifdef PGADMIN4_USE_WEBENGINE
+        #include <QtWebEngineView>
+    #else
+        #include <QWebView>
+    #endif
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -43,6 +47,7 @@ class BrowserWindow : public QMainWindow
 
 public:
     BrowserWindow(QString url);
+    ~BrowserWindow();
 
 protected:
     void closeEvent(QCloseEvent *event);
@@ -83,6 +88,8 @@ public slots:
     void createNewTabWindow(QWebEnginePage * &);
     void downloadEngineFileProgress(qint64 , qint64 );
     void downloadEngineFinished();
+#else
+    void createNewTabWindowKit(QWebPage * &);
 #endif
 
 private:
@@ -118,8 +125,12 @@ private:
     QString m_last_open_folder_path;
     QString m_dir;
     QNetworkReply *m_reply;
+
 #ifdef PGADMIN4_USE_WEBENGINE
     QWebEngineDownloadItem *m_download;
+#else
+    QNetworkCookieJar *m_cookieJar;
+    QNetworkAccessManager *m_netAccessMan;
 #endif
 
     void createActions();
diff --git a/runtime/WebViewWindow.cpp b/runtime/WebViewWindow.cpp
index 689ab31d6..79dd1f7ef 100644
--- a/runtime/WebViewWindow.cpp
+++ b/runtime/WebViewWindow.cpp
@@ -14,6 +14,11 @@
 // App headers
 #include "WebViewWindow.h"
 
+#ifndef PGADMIN4_USE_WEBENGINE
+#include <QWebPage>
+#include <QNetworkRequest>
+#endif
+
 // Override QWebEnginePage to handle link delegation
 #ifdef PGADMIN4_USE_WEBENGINE
 bool WebEnginePage::acceptNavigationRequest(const QUrl & url, NavigationType type, bool isMainFrame)
@@ -67,3 +72,42 @@ int WebViewWindow::getTabIndex() const
 {
     return m_tabIndex;
 }
+
+#ifndef PGADMIN4_USE_WEBENGINE
+WebViewPage::WebViewPage(QObject *parent)
+    : QWebPage(parent)
+{
+}
+
+bool WebViewPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type)
+{
+    Q_UNUSED(type);
+    Q_UNUSED(request);
+    Q_UNUSED(frame);
+    return true;
+}
+
+QWebPage *WebViewPage::createWindow(QWebPage::WebWindowType type)
+{
+    if (type == QWebPage::WebBrowserWindow)
+    {
+        QWebPage *_page = NULL;
+        emit createTabWindowKit(_page);
+        return _page;
+    }
+    return NULL;
+}
+
+bool WebViewPage::javaScriptConfirm(QWebFrame * frame, const QString & msg)
+{
+    // If required, override the QDialog to give custom confirmation message to user.
+    Q_UNUSED(frame);
+    Q_UNUSED(msg);
+    return false;
+}
+
+WebViewPage::~WebViewPage()
+{
+}
+
+#endif
diff --git a/runtime/WebViewWindow.h b/runtime/WebViewWindow.h
index c45750165..c930e0f8c 100644
--- a/runtime/WebViewWindow.h
+++ b/runtime/WebViewWindow.h
@@ -58,4 +58,23 @@ private:
 
 };
 
+#ifndef PGADMIN4_USE_WEBENGINE
+class WebViewPage : public QWebPage
+{
+    Q_OBJECT
+
+public:
+    WebViewPage(QObject *parent = 0);
+    ~WebViewPage();
+
+protected:
+    virtual bool acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type);
+    QWebPage *createWindow(QWebPage::WebWindowType type);
+    bool javaScriptConfirm(QWebFrame * frame, const QString & msg);
+
+signals:
+    void createTabWindowKit(QWebPage * &);
+};
+#endif
+
 #endif // WEBVIEWWINDOW_H
diff --git a/web/pgadmin/tools/datagrid/templates/datagrid/index.html b/web/pgadmin/tools/datagrid/templates/datagrid/index.html
index 727eb777f..f098c7262 100644
--- a/web/pgadmin/tools/datagrid/templates/datagrid/index.html
+++ b/web/pgadmin/tools/datagrid/templates/datagrid/index.html
@@ -265,6 +265,13 @@ function($, pgAdmin, R, S) {
     loadingDiv = $('#fetching_data'),
     msgDiv = loadingDiv.find('.sql-editor-busy-text');
 
+    // Register unload event on window close.
+    window.onbeforeunload = function(ev) {
+      $.ajax({
+        url: "{{ url_for('datagrid.index') }}" + "close/" + {{ uniqueId }},
+        method: 'GET'
+      });
+    };
     // Get the controller object from pgAdmin.SqlEditor
     var sqlEditorController = pgAdmin.SqlEditor.create(editorPanel);
 
diff --git a/web/pgadmin/tools/datagrid/templates/datagrid/js/datagrid.js b/web/pgadmin/tools/datagrid/templates/datagrid/js/datagrid.js
index e8e403388..2b35b7e6f 100644
--- a/web/pgadmin/tools/datagrid/templates/datagrid/js/datagrid.js
+++ b/web/pgadmin/tools/datagrid/templates/datagrid/js/datagrid.js
@@ -333,14 +333,6 @@ define(
             if (res.data.newBrowserTab) {
               var newWin = window.open(baseUrl, '_blank');
 
-              // Listen on the window closed event.
-              newWin.addEventListener("unload", function(e){
-                $.ajax({
-                  url: "{{ url_for('datagrid.index') }}" + "close/" + res.data.gridTransId,
-                  method: 'GET'
-                });
-              }, false);
-
               // add a load listener to the window so that the title gets changed on page load
               newWin.addEventListener("load", function() {
                 newWin.document.title = panel_title;
@@ -381,8 +373,7 @@ define(
           },
           error: function(e) {
             alertify.alert(
-              'SQL Tool Initialize Error',
-              e.responseJSON.errormsg
+              'SQL Tool Initialize Error'
             );
           }
         });
@@ -447,14 +438,6 @@ define(
             if (res.data.newBrowserTab) {
               var newWin = window.open(baseUrl, '_blank');
 
-              // Listen on the window closed event.
-              newWin.addEventListener("unload", function(e){
-                $.ajax({
-                  url: "{{ url_for('datagrid.index') }}" + "close/" + res.data.gridTransId,
-                  method: 'GET'
-                });
-              }, false);
-
               // add a load listener to the window so that the title gets changed on page load
               newWin.addEventListener("load", function() {
                 newWin.document.title = panel_title;
@@ -498,8 +481,7 @@ define(
           },
           error: function(e) {
             alertify.alert(
-              "{{ _('Query Tool Initialize Error') }}",
-              e.responseJSON.errormsg
+              "{{ _('Query Tool Initialize Error') }}"
             );
           }
         });
diff --git a/web/pgadmin/tools/debugger/__init__.py b/web/pgadmin/tools/debugger/__init__.py
index 9c435ff5a..2c0dbc4c4 100644
--- a/web/pgadmin/tools/debugger/__init__.py
+++ b/web/pgadmin/tools/debugger/__init__.py
@@ -510,7 +510,8 @@ def close(trans_id):
         trans_id
         - unique transaction id.
     """
-    # As debugger data is not in session that means we have already deleted and close the target
+    # As debugger data is not in session that means we have already
+    # deleted and close the target
     if 'debuggerData' not in session:
         return make_json_response(data={'status': True})
 
@@ -523,30 +524,17 @@ def close(trans_id):
     try:
         manager = get_driver(PG_DEFAULT_DRIVER).connection_manager(obj['server_id'])
         conn = manager.connection(did=obj['database_id'], conn_id=obj['conn_id'])
-    except Exception as e:
-        return internal_server_error(errormsg=str(e))
-
-    # find the debugger version and execute the query accordingly
-    dbg_version = obj['debugger_version']
-    if dbg_version <= 2:
-        template_path = 'debugger/sql/v1'
-    else:
-        template_path = 'debugger/sql/v2'
-
-    # Release the connection
-    if conn.connected():
-        # on successful connection cancel the running transaction
-        status, result = conn.cancel_transaction(obj['conn_id'], obj['database_id'])
-
+        conn.cancel_transaction(obj['conn_id'], obj['database_id'])
+        conn = manager.connection(did=obj['database_id'], conn_id=obj['exe_conn_id'])
+        conn.cancel_transaction(obj['exe_conn_id'], obj['database_id'])
+        manager.release(conn_id=obj['conn_id'])
+        manager.release(conn_id=obj['exe_conn_id'])
         # Delete the existing debugger data in session variable
         del session['debuggerData'][str(trans_id)]
         del session['functionData'][str(trans_id)]
-
-        # Release the connection acquired during the debugging
-        manager.release(did=obj['database_id'], conn_id=obj['conn_id'])
         return make_json_response(data={'status': True})
-    else:
-        return make_json_response(data={'status': False})
+    except Exception as e:
+        return internal_server_error(errormsg=str(e))
 
 
 @blueprint.route('/restart/<int:trans_id>', methods=['GET'])
diff --git a/web/pgadmin/tools/debugger/templates/debugger/direct.html b/web/pgadmin/tools/debugger/templates/debugger/direct.html
index 297c3624b..d82df0bbf 100644
--- a/web/pgadmin/tools/debugger/templates/debugger/direct.html
+++ b/web/pgadmin/tools/debugger/templates/debugger/direct.html
@@ -1,19 +1,25 @@
 {% extends "base.html" %}
 {% block title %}{{ _('Debugger - ') + function_name }}{% endblock %}
 {% block init_script %}
+
 try {
-require(
-['pgadmin', 'pgadmin.tools.debugger.direct'],
-function(pgAdmin, pgDirectDebug) {
-pgDirectDebug.init({{ uniqueId }}, {{ debug_type }});
-},
-function() {
-/* TODO:: Show proper error dialog */
-console.log(arguments);
-});
+  require(
+    ['pgadmin', 'pgadmin.tools.debugger.direct'],
+    function(pgAdmin, pgDirectDebug) {
+      pgDirectDebug.init({{ uniqueId }}, {{ debug_type }});
+
+      window.onbeforeunload = function(ev) {
+        $.ajax({
+          url: "{{ url_for('debugger.index') }}close/{{ uniqueId }}",
+          method: 'GET'
+        });
+      };
+    },
+    function() {
+      console.log(arguments);
+    });
 } catch (err) {
-/* Show proper error dialog */
-console.log(err);
+  console.log(err);
 }
 {% endblock %}
 {% block body %}
diff --git a/web/pgadmin/tools/debugger/templates/debugger/js/debugger.js b/web/pgadmin/tools/debugger/templates/debugger/js/debugger.js
index ad1858c8d..86886ea64 100644
--- a/web/pgadmin/tools/debugger/templates/debugger/js/debugger.js
+++ b/web/pgadmin/tools/debugger/templates/debugger/js/debugger.js
@@ -242,16 +242,7 @@ define(
             var url = "{{ url_for('debugger.index') }}" + "direct/" + res.data.debuggerTransId;
 
             if (res.data.newBrowserTab) {
-              var newWin = window.open(url, '_blank');
-
-              // Listen on the window closed event.
-              newWin.addEventListener("unload", function(e){
-                var closeUrl = "{{ url_for('debugger.index') }}" + "close/" + res.data.debuggerTransId;
-                $.ajax({
-                  url: closeUrl,
-                  method: 'GET'
-                });
-              }, false);
+              window.open(url, '_blank');
             } else {
               pgBrowser.Events.once(
                 'pgadmin-browser:frame:urlloaded:frm_debugger', function(frame) {
@@ -345,16 +336,7 @@ define(
                   var url = "{{ url_for('debugger.index') }}" + "direct/" + res.data.debuggerTransId;
 
                   if (res.data.newBrowserTab) {
-                    var newWin = window.open(url, '_blank');
-
-                    // Listen on the window closed event.
-                    newWin.addEventListener("unload", function(e){
-                      var closeUrl = "{{ url_for('debugger.index') }}" + "close/" + res.data.debuggerTransId;
-                      $.ajax({
-                        url: closeUrl,
-                        method: 'GET'
-                      });
-                    }, false);
+                    window.open(url, '_blank');
                   } else {
                     pgBrowser.Events.once(
                       'pgadmin-browser:frame:urlloaded:frm_debugger', function(frame) {
diff --git a/web/pgadmin/tools/debugger/templates/debugger/js/debugger_ui.js b/web/pgadmin/tools/debugger/templates/debugger/js/debugger_ui.js
index 5af7c8be0..34447955f 100644
--- a/web/pgadmin/tools/debugger/templates/debugger/js/debugger_ui.js
+++ b/web/pgadmin/tools/debugger/templates/debugger/js/debugger_ui.js
@@ -554,16 +554,7 @@ define(
                     var url = "{{ url_for('debugger.index') }}" + "direct/" + res.data.debuggerTransId;
 
                     if (res.data.newBrowserTab) {
-                      var newWin = window.open(url, '_blank');
-
-                      // Listen on the window closed event.
-                      newWin.addEventListener("unload", function(e){
-                        var closeUrl = "{{ url_for('debugger.index') }}" + "close/" + res.data.debuggerTransId;
-                        $.ajax({
-                          url: closeUrl,
-                          method: 'GET'
-                        });
-                      }, false);
+                      window.open(url, '_blank');
                     } else {
                       pgBrowser.Events.once(
                         'pgadmin-browser:frame:urlloaded:frm_debugger', function(frame) {
diff --git a/web/pgadmin/tools/debugger/templates/debugger/js/direct.js b/web/pgadmin/tools/debugger/templates/debugger/js/direct.js
index 8bdfdda65..77af64e80 100644
--- a/web/pgadmin/tools/debugger/templates/debugger/js/direct.js
+++ b/web/pgadmin/tools/debugger/templates/debugger/js/direct.js
@@ -43,7 +43,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Breakpoint set execution error'
+              'Debugger Error',
+              'Error while setting debugging breakpoint.'
             );
           }
         });
@@ -102,13 +103,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Error fetching breakpoint information'
+                'Debugger Error',
+                'Error while fetching breakpoint information.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Error fetching breakpoint information'
+              'Debugger Error',
+              'Error while fetching breakpoint information.'
             );
           }
         });
@@ -132,13 +135,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Start execution error'
+                'Debugger Error',
+                'Error while starting debugging session.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Start execution error'
+              'Debugger Error',
+              'Error while starting debugging session.'
             );
           }
         });
@@ -170,13 +175,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Execution error'
+                'Debugger Error',
+                'Error while executing requested debugging information.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Execution error'
+              'Debugger Error',
+              'Error while executing requested debugging information.'
             );
           }
         });
@@ -207,13 +214,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Error fetching variable information'
+                'Debugger Error',
+                'Error while fetching variable information.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Error fetching variable information'
+              'Debugger Error',
+              'Error while fetching variable information.'
             );
           }
         });
@@ -237,13 +246,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Error fetching stack information'
+                'Debugger Error',
+                'Error while fetching stack information.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Error fetching stack information'
+              'Debugger Error',
+              'Error while fetching stack information.'
             );
           }
         });
@@ -367,13 +378,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger Poll Result Error'
+                'Debugger Error',
+                'Error while polling result.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger Poll Result Error'
+              'Debugger Error',
+              'Error while polling result.'
             );
           }
         });
@@ -559,8 +572,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger poll end execution error',
-              e.responseJSON.errormsg
+              'Debugger Error',
+              'Error while polling result.'
             );
           }
         });
@@ -619,8 +632,8 @@ define(
               },
               error: function(e) {
                 Alertify.alert(
-                  'Debugger listener starting error',
-                  e.responseJSON.errormsg
+                  'Debugger Error',
+                  'Error while polling result.'
                 );
               }
             });
@@ -665,13 +678,15 @@ define(
             }
             else {
               Alertify.alert(
-                'Debugger: Continue execution error'
+                'Debugger Error',
+                'Error while executing continue in debugging session.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Continue execution error'
+              'Debugger Error',
+              'Error while executing continue in debugging session.'
             );
           }
         });
@@ -699,13 +714,15 @@ define(
             }
             else {
               Alertify.alert(
-                'Debugger: Step over execution error'
+                'Debugger Error',
+                'Error while executing step over in debugging session.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Step over execution error'
+              'Debugger Error',
+              'Error while executing step over in debugging session.'
             );
           }
         });
@@ -732,13 +749,15 @@ define(
             }
             else {
               Alertify.alert(
-                'Debugger: Step into execution error'
+                'Debugger Error',
+                'Error while executing step into in debugging session.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Step into execution error'
+              'Debugger Error',
+              'Error while executing step into in debugging session.'
             );
           }
         });
@@ -779,13 +798,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Stop execution error'
+                'Debugger Error',
+                'Error while executing stop in debugging session.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Stop execution error'
+              'Debugger Error',
+              'Error while executing stop in debugging session.'
             );
           }
         });
@@ -841,13 +862,15 @@ define(
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
-                'Debugger: Toggle breakpoint execution error'
+                'Debugger Error',
+                'Error while toggling breakpoint.'
               );
             }
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Toggle breakpoint execution error'
+              'Debugger Error',
+              'Error while toggling breakpoint.'
             );
           }
         });
@@ -904,7 +927,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Clear all breakpoint execution error'
+              'Debugger Error',
+              'Error while clearing all breakpoint.'
             );
           }
         });
@@ -1164,8 +1188,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Deposit value execution error',
-              e.responseJSON.errormsg
+              'Debugger Error',
+              'Error while depositing variable value.'
             );
           }
         });
@@ -1193,8 +1217,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger: Select frame execution error',
-              e.responseJSON.errormsg
+              'Debugger Error',
+              'Error while selecting frame.'
             );
           }
         });
@@ -1364,8 +1388,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger listener starting error',
-              e.responseJSON.errormsg
+              'Debugger Error',
+              'Error while starting debugging listener.'
             );
           }
         });
@@ -1385,8 +1409,8 @@ define(
           },
           error: function(e) {
             Alertify.alert(
-              'Debugger listener starting error',
-              e.responseJSON.errormsg
+              'Debugger Error',
+              'Error while starting debugging listener.'
             );
           }
         });
@@ -1424,7 +1448,8 @@ define(
         },
         error: function(e) {
           Alertify.alert(
-            'Debugger: Error fetching messages information'
+            'Debugger Error',
+            'Error while fetching messages information.'
           );
         }
       });