diff --git a/src/defines.pri b/src/defines.pri
index 362809d7b..d95aca109 100644
--- a/src/defines.pri
+++ b/src/defines.pri
@@ -18,9 +18,6 @@ win32 {
 DEFINES *= QT_NO_URL_CAST_FROM_STRING
 DEFINES *= QT_USE_QSTRINGBUILDER
 
-##It won't compile on windows with this define. Some bug in qtsingleapp / qvector template
-!win32: !CONFIG(debug, debug|release): DEFINES *= QT_NO_DEBUG_OUTPUT
-
 CONFIG(debug, debug|release): DEFINES *= QUPZILLA_DEBUG_BUILD
 
 d_no_system_datapath = $$(NO_SYSTEM_DATAPATH)
diff --git a/src/lib/app/mainapplication.cpp b/src/lib/app/mainapplication.cpp
index f4a604686..e5cc7999c 100644
--- a/src/lib/app/mainapplication.cpp
+++ b/src/lib/app/mainapplication.cpp
@@ -45,7 +45,7 @@
 #include "webpage.h"
 #include "settings.h"
 #include "locationbarsettings.h"
-#include "webviewsettings.h"
+#include "websettings.h"
 #include "clearprivatedata.h"
 #include "commandlineoptions.h"
 
@@ -359,7 +359,7 @@ void MainApplication::loadSettings()
     }
 
     LocationBarSettings::loadSettings();
-    WebViewSettings::loadSettings();
+    WebSettings::loadSettings();
 }
 
 void MainApplication::reloadSettings()
diff --git a/src/lib/lib.pro b/src/lib/lib.pro
index 9ae30faa1..0319e9800 100644
--- a/src/lib/lib.pro
+++ b/src/lib/lib.pro
@@ -162,14 +162,14 @@ SOURCES += \
     popupwindow/popuplocationbar.cpp \
     webview/tabbedwebview.cpp \
     webview/webview.cpp \
-    webview/webviewsettings.cpp \
     preferences/pluginlistdelegate.cpp \
     popupwindow/popupstatusbarmessage.cpp \
     other/licenseviewer.cpp \
     bookmarksimport/bookmarksimporticonfetcher.cpp \
     other/checkboxdialog.cpp \
     network/schemehandler.cpp \
-    tools/plaineditwithlines.cpp
+    tools/plaineditwithlines.cpp \
+    webview/websettings.cpp
 
 HEADERS  += \
     webview/tabpreview.h \
@@ -303,7 +303,6 @@ HEADERS  += \
     webview/tabbedwebview.h \
     webview/webview.h \
     app/qz_namespace.h \
-    webview/webviewsettings.h \
     preferences/pluginlistdelegate.h \
     popupwindow/popupstatusbarmessage.h \
     other/licenseviewer.h \
@@ -311,7 +310,8 @@ HEADERS  += \
     other/checkboxdialog.h \
     network/schemehandler.h \
     tools/plaineditwithlines.h \
-    sidebar/sidebarinterface.h
+    sidebar/sidebarinterface.h \
+    webview/websettings.h
 
 FORMS    += \
     preferences/autofillmanager.ui \
diff --git a/src/lib/webview/webpage.cpp b/src/lib/webview/webpage.cpp
index 1d46ef469..2bdcf3791 100644
--- a/src/lib/webview/webpage.cpp
+++ b/src/lib/webview/webpage.cpp
@@ -32,6 +32,7 @@
 #include "networkmanagerproxy.h"
 #include "adblockicon.h"
 #include "iconprovider.h"
+#include "websettings.h"
 
 #ifdef NONBLOCK_JS_DIALOGS
 #include "ui_jsconfirm.h"
@@ -282,6 +283,52 @@ void WebPage::handleUnsupportedContent(QNetworkReply* reply)
     reply->deleteLater();
 }
 
+void WebPage::handleUnknownProtocol(const QUrl &url)
+{
+    const QString &protocol = url.scheme();
+
+    if (WebSettings::blockedProtocols.contains(protocol)) {
+        qDebug() << "WebPage::handleUnknownProtocol Protocol" << protocol << "is blocked!";
+        return;
+    }
+
+    if (WebSettings::autoOpenProtocols.contains(protocol)) {
+        QDesktopServices::openUrl(url);
+        return;
+    }
+
+    const QString &text = tr("QupZilla cannot handle <b>%1:</b> links. The requested link "
+                             "is <ul><li>%2</li></ul>Do you want QupZilla to try "
+                             "open this link in system application?<br/>").arg(protocol, url.toString());
+    CheckBoxDialog dialog(QDialogButtonBox::Yes | QDialogButtonBox::No, view());
+    dialog.setText(text);
+    dialog.setCheckBoxText(tr("Remember my choice for this protocol"));
+    dialog.setWindowTitle(tr("External Protocol Request"));
+    dialog.setIcon(IconProvider::standardIcon(QStyle::SP_MessageBoxQuestion));
+
+    switch (dialog.exec()) {
+    case QDialog::Accepted:
+        if (dialog.isChecked()) {
+            WebSettings::autoOpenProtocols.append(protocol);
+            WebSettings::saveSettings();
+        }
+
+        QDesktopServices::openUrl(url);
+        break;
+
+    case QDialog::Rejected:
+        if (dialog.isChecked()) {
+            WebSettings::blockedProtocols.append(protocol);
+            WebSettings::saveSettings();
+        }
+
+        break;
+
+    default:
+        break;
+    }
+}
+
 void WebPage::downloadRequested(const QNetworkRequest &request)
 {
     DownloadManager* dManager = mApp->downManager();
@@ -531,6 +578,10 @@ bool WebPage::extension(Extension extension, const ExtensionOption* option, Exte
         case QNetworkReply::UnknownNetworkError:
             errorString = exOption->errorString.isEmpty() ? tr("Unknown network error") : exOption->errorString;
             break;
+        case QNetworkReply::ProtocolUnknownError:
+            handleUnknownProtocol(exOption->url);
+            return false;
+            break;
         case QNetworkReply::ContentAccessDenied:
             if (exOption->errorString.startsWith("AdBlockRule")) {
                 if (exOption->frame != erPage->mainFrame()) { //Content in <iframe>
diff --git a/src/lib/webview/webpage.h b/src/lib/webview/webpage.h
index 820481f67..e881ba73d 100644
--- a/src/lib/webview/webpage.h
+++ b/src/lib/webview/webpage.h
@@ -102,11 +102,13 @@ protected:
     QWebPage* createWindow(QWebPage::WebWindowType type);
 
 private:
-    virtual bool supportsExtension(Extension extension) const;
-    virtual bool extension(Extension extension, const ExtensionOption* option, ExtensionReturn* output = 0);
+    bool supportsExtension(Extension extension) const;
+    bool extension(Extension extension, const ExtensionOption* option, ExtensionReturn* output = 0);
     bool acceptNavigationRequest(QWebFrame* frame, const QNetworkRequest &request, NavigationType type);
     QString chooseFile(QWebFrame* originatingFrame, const QString &oldFile);
 
+    void handleUnknownProtocol(const QUrl &url);
+
     static QString m_lastUploadLocation;
     static QString m_userAgent;
     static QString m_fakeUserAgent;
diff --git a/src/lib/webview/webviewsettings.cpp b/src/lib/webview/websettings.cpp
similarity index 62%
rename from src/lib/webview/webviewsettings.cpp
rename to src/lib/webview/websettings.cpp
index 33f71367c..0ef2c9929 100644
--- a/src/lib/webview/webviewsettings.cpp
+++ b/src/lib/webview/websettings.cpp
@@ -15,17 +15,16 @@
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ============================================================ */
-#include "webviewsettings.h"
+#include "websettings.h"
 #include "settings.h"
 
-int WebViewSettings::defaultZoom = 100;
-bool WebViewSettings::loadTabsOnActivation = false;
+int WebSettings::defaultZoom = 100;
+bool WebSettings::loadTabsOnActivation = false;
 
-WebViewSettings::WebViewSettings()
-{
-}
+QStringList WebSettings::autoOpenProtocols;
+QStringList WebSettings::blockedProtocols;
 
-void WebViewSettings::loadSettings()
+void WebSettings::loadSettings()
 {
     Settings settings;
     settings.beginGroup("Web-Browser-Settings");
@@ -33,5 +32,19 @@ void WebViewSettings::loadSettings()
     defaultZoom = settings.value("DefaultZoom", 100).toInt();
     loadTabsOnActivation = settings.value("LoadTabsOnActivation", false).toBool();
 
+    autoOpenProtocols = settings.value("AutomaticallyOpenProtocols", QStringList()).toStringList();
+    blockedProtocols = settings.value("BlockOpeningProtocols", QStringList()).toStringList();
+
+    settings.endGroup();
+}
+
+void WebSettings::saveSettings()
+{
+    Settings settings;
+    settings.beginGroup("Web-Browser-Settings");
+
+    settings.setValue("AutomaticallyOpenProtocols", autoOpenProtocols);
+    settings.setValue("BlockOpeningProtocols", blockedProtocols);
+
     settings.endGroup();
 }
diff --git a/src/lib/webview/webviewsettings.h b/src/lib/webview/websettings.h
similarity index 85%
rename from src/lib/webview/webviewsettings.h
rename to src/lib/webview/websettings.h
index 57ee98224..6adfc930a 100644
--- a/src/lib/webview/webviewsettings.h
+++ b/src/lib/webview/websettings.h
@@ -20,15 +20,21 @@
 
 #include "qz_namespace.h"
 
-class WebViewSettings
+#include <QStringList>
+
+class WebSettings
 {
 public:
-    WebViewSettings();
+    WebSettings();
 
     static void loadSettings();
+    static void saveSettings();
 
     static int defaultZoom;
     static bool loadTabsOnActivation;
+
+    static QStringList autoOpenProtocols;
+    static QStringList blockedProtocols;
 };
 
 #endif // WEBVIEWSETTINGS_H
diff --git a/src/lib/webview/webtab.cpp b/src/lib/webview/webtab.cpp
index 871b6ad7d..e5b10ba95 100644
--- a/src/lib/webview/webtab.cpp
+++ b/src/lib/webview/webtab.cpp
@@ -23,7 +23,7 @@
 #include "tabwidget.h"
 #include "locationbar.h"
 #include "globalfunctions.h"
-#include "webviewsettings.h"
+#include "websettings.h"
 
 #include <QVBoxLayout>
 #include <QWebHistory>
@@ -221,7 +221,7 @@ bool WebTab::isRestored() const
 
 void WebTab::restoreTab(const WebTab::SavedTab &tab)
 {
-    if (WebViewSettings::loadTabsOnActivation) {
+    if (WebSettings::loadTabsOnActivation) {
         m_savedTab = tab;
         int index = tabIndex();
 
diff --git a/src/lib/webview/webview.cpp b/src/lib/webview/webview.cpp
index a296557b0..6bfd08a03 100644
--- a/src/lib/webview/webview.cpp
+++ b/src/lib/webview/webview.cpp
@@ -29,7 +29,7 @@
 #include "browsinglibrary.h"
 #include "bookmarksmanager.h"
 #include "settings.h"
-#include "webviewsettings.h"
+#include "websettings.h"
 #include "enhancedmenu.h"
 #include "pluginproxy.h"
 
@@ -117,7 +117,7 @@ void WebView::setPage(QWebPage* page)
     QWebView::setPage(page);
     m_page = qobject_cast<WebPage*>(page);
 
-    setZoom(WebViewSettings::defaultZoom);
+    setZoom(WebSettings::defaultZoom);
     connect(m_page, SIGNAL(saveFrameStateRequested(QWebFrame*, QWebHistoryItem*)), this, SLOT(frameStateChanged()));
     connect(m_page, SIGNAL(privacyChanged(bool)), this, SIGNAL(privacyChanged(bool)));