diff --git a/src/lib/app/mainapplication.cpp b/src/lib/app/mainapplication.cpp
index 5f726b8f2..87a3136fd 100644
--- a/src/lib/app/mainapplication.cpp
+++ b/src/lib/app/mainapplication.cpp
@@ -269,22 +269,7 @@ MainApplication::MainApplication(int &argc, char** argv)
 
     m_networkManager = new NetworkManager(this);
 
-    // Setup QWebChannel userscript
-    QWebEngineScript script;
-    script.setName(QSL("_falkon_webchannel"));
-    script.setInjectionPoint(QWebEngineScript::DocumentCreation);
-    script.setWorldId(WebPage::SafeJsWorld);
-    script.setRunsOnSubFrames(true);
-    script.setSourceCode(Scripts::setupWebChannel(script.worldId()));
-    m_webProfile->scripts()->insert(script);
-
-    QWebEngineScript script2;
-    script2.setName(QSL("_qupzilla_webchannel2"));
-    script2.setInjectionPoint(QWebEngineScript::DocumentCreation);
-    script2.setWorldId(WebPage::UnsafeJsWorld);
-    script2.setRunsOnSubFrames(true);
-    script2.setSourceCode(Scripts::setupWebChannel(script2.worldId()));
-    m_webProfile->scripts()->insert(script2);
+    setupUserScripts();
 
     if (!isPrivate()) {
         m_sessionManager = new SessionManager(this);
@@ -1131,6 +1116,36 @@ void MainApplication::checkOptimizeDatabase()
     settings.endGroup();
 }
 
+void MainApplication::setupUserScripts()
+{
+    // WebChannel for SafeJsWorld
+    QWebEngineScript script;
+    script.setName(QSL("_falkon_webchannel"));
+    script.setInjectionPoint(QWebEngineScript::DocumentCreation);
+    script.setWorldId(WebPage::SafeJsWorld);
+    script.setRunsOnSubFrames(true);
+    script.setSourceCode(Scripts::setupWebChannel(script.worldId()));
+    m_webProfile->scripts()->insert(script);
+
+    // WebChannel for UnsafeJsWorld
+    QWebEngineScript script2;
+    script2.setName(QSL("_falkon_webchannel2"));
+    script2.setInjectionPoint(QWebEngineScript::DocumentCreation);
+    script2.setWorldId(WebPage::UnsafeJsWorld);
+    script2.setRunsOnSubFrames(true);
+    script2.setSourceCode(Scripts::setupWebChannel(script2.worldId()));
+    m_webProfile->scripts()->insert(script2);
+
+    // window.external support
+    QWebEngineScript script3;
+    script3.setName(QSL("_falkon_window_external"));
+    script3.setInjectionPoint(QWebEngineScript::DocumentCreation);
+    script3.setWorldId(WebPage::UnsafeJsWorld);
+    script3.setRunsOnSubFrames(true);
+    script3.setSourceCode(Scripts::setupWindowExternal());
+    m_webProfile->scripts()->insert(script3);
+}
+
 void MainApplication::setUserStyleSheet(const QString &filePath)
 {
     QString userCss;
diff --git a/src/lib/app/mainapplication.h b/src/lib/app/mainapplication.h
index 714afe991..188f40557 100644
--- a/src/lib/app/mainapplication.h
+++ b/src/lib/app/mainapplication.h
@@ -156,6 +156,7 @@ private:
 
     void translateApp();
 
+    void setupUserScripts();
     void setUserStyleSheet(const QString &filePath);
 
     void checkDefaultWebBrowser();
diff --git a/src/lib/tools/scripts.cpp b/src/lib/tools/scripts.cpp
index fab318e38..640f72305 100644
--- a/src/lib/tools/scripts.cpp
+++ b/src/lib/tools/scripts.cpp
@@ -143,6 +143,23 @@ QString Scripts::setupFormObserver()
     return source;
 }
 
+QString Scripts::setupWindowExternal()
+{
+    QString source = QL1S("(function() {"
+                          "var external = {};"
+                          "external.AddSearchProvider = function(url) {"
+                          "    window.location = 'qupzilla:AddSearchProvider?url=' + url;"
+                          "};"
+                          "external.IsSearchProviderInstalled = function(url) {"
+                          "    console.warn('NOT IMPLEMENTED: IsSearchProviderInstalled()');"
+                          "    return false;"
+                          "};"
+                          "window.external = external;"
+                          "})()");
+
+    return source;
+}
+
 QString Scripts::setCss(const QString &css)
 {
     QString source = QL1S("(function() {"
diff --git a/src/lib/tools/scripts.h b/src/lib/tools/scripts.h
index 4cf799c30..4965bc725 100644
--- a/src/lib/tools/scripts.h
+++ b/src/lib/tools/scripts.h
@@ -30,6 +30,7 @@ class FALKON_EXPORT Scripts
 public:
     static QString setupWebChannel(quint32 worldId);
     static QString setupFormObserver();
+    static QString setupWindowExternal();
 
     static QString setCss(const QString &css);
     static QString sendPostData(const QUrl &url, const QByteArray &data);
diff --git a/src/lib/webengine/webpage.cpp b/src/lib/webengine/webpage.cpp
index d6abf0eca..214403524 100644
--- a/src/lib/webengine/webpage.cpp
+++ b/src/lib/webengine/webpage.cpp
@@ -55,6 +55,7 @@
 #include <QFileDialog>
 #include <QAuthenticator>
 #include <QPushButton>
+#include <QUrlQuery>
 
 QString WebPage::s_lastUploadLocation = QDir::homePath();
 QUrl WebPage::s_lastUnsupportedUrl;
@@ -379,6 +380,12 @@ bool WebPage::acceptNavigationRequest(const QUrl &url, QWebEnginePage::Navigatio
     if (!mApp->plugins()->acceptNavigationRequest(this, url, type, isMainFrame))
         return false;
 
+    if (url.scheme() == QL1S("qupzilla") && url.path() == QL1S("AddSearchProvider")) {
+        QUrlQuery query(url);
+        mApp->searchEnginesManager()->addEngine(QUrl(query.queryItemValue(QSL("url"))));
+        return false;
+    }
+
     const bool result = QWebEnginePage::acceptNavigationRequest(url, type, isMainFrame);
 
     if (result && isMainFrame) {