diff --git a/src/lib/plugins/qml/api/extensionscheme/qmlextensionscheme.h b/src/lib/plugins/qml/api/extensionscheme/qmlextensionscheme.h
index 286b011b6..1669786f8 100644
--- a/src/lib/plugins/qml/api/extensionscheme/qmlextensionscheme.h
+++ b/src/lib/plugins/qml/api/extensionscheme/qmlextensionscheme.h
@@ -30,6 +30,7 @@ class QmlExtensionSchemeHandler;
 class QmlExtensionScheme : public QObject, public QQmlParserStatus
 {
     Q_OBJECT
+    Q_INTERFACES(QQmlParserStatus)
     /**
      * @brief extension scheme handle name
      */
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscript.cpp b/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
index 5ae35a82a..f1fc8f27b 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
+++ b/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
@@ -16,12 +16,18 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ============================================================ */
 #include "qmluserscript.h"
+#include "../../qmlstaticdata.h"
 
 QmlUserScript::QmlUserScript(QObject *parent)
     : QObject(parent)
 {
 }
 
+QmlUserScript::~QmlUserScript()
+{
+    QmlStaticData::instance().getUserScriptsSingleton()->remove(this);
+}
+
 QWebEngineScript QmlUserScript::webEngineScript() const
 {
     return m_webEngineScript;
@@ -46,6 +52,7 @@ void QmlUserScript::setName(const QString &name)
 {
     m_webEngineScript.setName(name);
     emit nameChanged(name);
+    aboutToUpdateUnderlyingScript();
 }
 
 bool QmlUserScript::runsOnSubFrames() const
@@ -57,6 +64,7 @@ void QmlUserScript::setRunsOnSubFrames(bool runsOnSubFrames)
 {
     m_webEngineScript.setRunsOnSubFrames(runsOnSubFrames);
     emit runsOnSubFramesChanged(runsOnSubFrames);
+    aboutToUpdateUnderlyingScript();
 }
 
 int QmlUserScript::worldId() const
@@ -80,6 +88,7 @@ void QmlUserScript::setWorldId(int worldId)
         break;
     }
     emit worldIdChanged(worldId);
+    aboutToUpdateUnderlyingScript();
 }
 
 QString QmlUserScript::sourceCode() const
@@ -91,6 +100,7 @@ void QmlUserScript::setSourceCode(const QString &sourceCode)
 {
     m_webEngineScript.setSourceCode(sourceCode);
     emit sourceCodeChanged(sourceCode);
+    aboutToUpdateUnderlyingScript();
 }
 
 QmlUserScript::InjectionPoint QmlUserScript::injectionPoint() const
@@ -114,4 +124,24 @@ void QmlUserScript::setInjectionPoint(InjectionPoint injectionPoint)
         break;
     }
     emit injectionPointChanged(injectionPoint);
+    aboutToUpdateUnderlyingScript();
+}
+
+void QmlUserScript::timerEvent(QTimerEvent *e)
+{
+    if (e->timerId() != m_basicTimer.timerId()) {
+        QObject::timerEvent(e);
+        return;
+    }
+    m_basicTimer.stop();
+    QmlStaticData::instance().getUserScriptsSingleton()->insert(this);
+}
+
+void QmlUserScript::aboutToUpdateUnderlyingScript()
+{
+    if (!m_basicTimer.isActive()) {
+        QmlStaticData::instance().getUserScriptsSingleton()->remove(this);
+    }
+    // Defer updates to the next event loop
+    m_basicTimer.start(0, this);
 }
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscript.h b/src/lib/plugins/qml/api/userscript/qmluserscript.h
index 5a6944256..98ccd1777 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscript.h
+++ b/src/lib/plugins/qml/api/userscript/qmluserscript.h
@@ -20,6 +20,7 @@
 #include "qzcommon.h"
 
 #include <QObject>
+#include <QBasicTimer>
 #include <QWebEngineScript>
 
 /**
@@ -73,6 +74,7 @@ public:
     Q_ENUM(ScriptWorldId)
 
     explicit QmlUserScript(QObject *parent = nullptr);
+    ~QmlUserScript();
     QWebEngineScript webEngineScript() const;
     void setWebEngineScript(const QWebEngineScript &script);
 Q_SIGNALS:
@@ -98,6 +100,7 @@ Q_SIGNALS:
     void injectionPointChanged(int injectionPoint);
 private:
     QWebEngineScript m_webEngineScript;
+    QBasicTimer m_basicTimer;
 
     bool null() const;
     QString name() const;
@@ -110,4 +113,7 @@ private:
     void setSourceCode(const QString &sourceCode);
     InjectionPoint injectionPoint() const;
     void setInjectionPoint(InjectionPoint injectionPoint);
+
+    void timerEvent(QTimerEvent *e) override;
+    void aboutToUpdateUnderlyingScript();
 };
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp b/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
index 0a43ff1b7..841043967 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
+++ b/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
@@ -26,14 +26,6 @@ QmlUserScripts::QmlUserScripts(QObject *parent)
 {
 }
 
-QmlUserScripts::~QmlUserScripts()
-{
-    // remove scripts added by the plugin
-    for (const QWebEngineScript &webEngineScript : qAsConst(m_webEngineScripts)) {
-        mApp->webProfile()->scripts()->remove(webEngineScript);
-    }
-}
-
 int QmlUserScripts::count() const
 {
     return mApp->webProfile()->scripts()->count();
@@ -85,30 +77,6 @@ QList<QObject*> QmlUserScripts::findScripts(const QString &name) const
     return toQObjectList(list);
 }
 
-void QmlUserScripts::insert(QObject *object)
-{
-    QmlUserScript *userScript = qobject_cast<QmlUserScript*>(object);
-    if (!userScript) {
-        return;
-    }
-    QWebEngineScript webEngineScript = userScript->webEngineScript();
-    mApp->webProfile()->scripts()->insert(webEngineScript);
-    m_webEngineScripts.append(webEngineScript);
-}
-
-void QmlUserScripts::insert(const QList<QObject*> &list)
-{
-    for (QObject *object : list) {
-        QmlUserScript *userScript = qobject_cast<QmlUserScript*>(object);
-        if (!userScript) {
-            continue;
-        }
-        QWebEngineScript webEngineScript = userScript->webEngineScript();
-        mApp->webProfile()->scripts()->insert(webEngineScript);
-        m_webEngineScripts.append(webEngineScript);
-    }
-}
-
 void QmlUserScripts::remove(QObject *object) const
 {
     QmlUserScript *userScript = qobject_cast<QmlUserScript*>(object);
@@ -124,3 +92,13 @@ QList<QObject*> QmlUserScripts::toList() const
     QList<QWebEngineScript> list = mApp->webProfile()->scripts()->toList();
     return toQObjectList(list);
 }
+
+void QmlUserScripts::insert(QObject *object)
+{
+    QmlUserScript *userScript = qobject_cast<QmlUserScript*>(object);
+    if (!userScript) {
+        return;
+    }
+    QWebEngineScript webEngineScript = userScript->webEngineScript();
+    mApp->webProfile()->scripts()->insert(webEngineScript);
+}
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscripts.h b/src/lib/plugins/qml/api/userscript/qmluserscripts.h
index 4bc7bb9d0..5fc7f8e42 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscripts.h
+++ b/src/lib/plugins/qml/api/userscript/qmluserscripts.h
@@ -40,7 +40,6 @@ class FALKON_EXPORT QmlUserScripts : public QObject
     Q_PROPERTY(bool empty READ empty CONSTANT)
 public:
     explicit QmlUserScripts(QObject *parent = nullptr);
-    ~QmlUserScripts();
     /**
      * @brief Checks if the script is in collection
      * @param object of type QmlUserScript
@@ -58,16 +57,6 @@ public:
      * @return list of objects, each of type QmlUserScript, representing the script of given name
      */
     Q_INVOKABLE QList<QObject*> findScripts(const QString &name) const;
-    /**
-     * @brief Inserts a script into collection
-     * @param object of type QmlUserScript
-     */
-    Q_INVOKABLE void insert(QObject *object);
-    /**
-     * @brief Inserts a list of scripts into collection
-     * @param list of objects, each of type QmlUserScript
-     */
-    Q_INVOKABLE void insert(const QList<QObject*> &list);
     /**
      * @brief Removes a script from collection
      * @param object of type QmlUserScript
@@ -78,11 +67,12 @@ public:
      * @return list of objects, each of type QmlUserScript
      */
     Q_INVOKABLE QList<QObject*> toList() const;
+
+    void insert(QObject *object);
 private:
     int count() const;
     int size() const;
     bool empty() const;
-    QList<QWebEngineScript> m_webEngineScripts;
 
     QList<QObject*> toQObjectList(const QList<QWebEngineScript> &list) const;
 };
diff --git a/src/lib/plugins/qml/qmlplugin.cpp b/src/lib/plugins/qml/qmlplugin.cpp
index 2462812d5..a3d3ef937 100644
--- a/src/lib/plugins/qml/qmlplugin.cpp
+++ b/src/lib/plugins/qml/qmlplugin.cpp
@@ -70,7 +70,7 @@ void QmlPlugin::initPlugin(Plugins::Plugin *plugin)
     }
     qmlPluginLoader->createComponent();
     if (!qmlPluginLoader->instance()) {
-        qWarning().noquote() << "Falied to create component for" << name << "plugin:" << qmlPluginLoader->component()->errorString();
+        qWarning().noquote() << "Failed to create component for" << name << "plugin:" << qmlPluginLoader->component()->errorString();
         return;
     }
 
diff --git a/src/lib/plugins/qml/qmlstaticdata.cpp b/src/lib/plugins/qml/qmlstaticdata.cpp
index d7a0457fa..f2cf1fd0c 100644
--- a/src/lib/plugins/qml/qmlstaticdata.cpp
+++ b/src/lib/plugins/qml/qmlstaticdata.cpp
@@ -25,6 +25,8 @@
 #include "api/fileutils/qmlfileutils.h"
 #include "pluginproxy.h"
 
+#include <QQmlEngine>
+
 QmlStaticData::QmlStaticData(QObject *parent)
     : QObject(parent)
 {
@@ -138,53 +140,62 @@ QIcon QmlStaticData::getIcon(const QString &iconPath, const QString &pluginPath)
 QmlBookmarks *QmlStaticData::getBookmarksSingleton()
 {
     static QmlBookmarks *bookmarks = new QmlBookmarks(this);
+    QQmlEngine::setObjectOwnership(bookmarks, QQmlEngine::CppOwnership);
     return bookmarks;
 }
 
 QmlHistory *QmlStaticData::getHistorySingleton()
 {
     static QmlHistory *history = new QmlHistory(this);
+    QQmlEngine::setObjectOwnership(history, QQmlEngine::CppOwnership);
     return history;
 }
 
 QmlCookies *QmlStaticData::getCookiesSingleton()
 {
     static QmlCookies *cookies = new QmlCookies(this);
+    QQmlEngine::setObjectOwnership(cookies, QQmlEngine::CppOwnership);
     return cookies;
 }
 
 QmlTopSites *QmlStaticData::getTopSitesSingleton()
 {
     static QmlTopSites *topSites = new QmlTopSites(this);
+    QQmlEngine::setObjectOwnership(topSites, QQmlEngine::CppOwnership);
     return topSites;
 }
 
 QmlTabs *QmlStaticData::getTabsSingleton()
 {
     static QmlTabs *tabs = new QmlTabs(this);
+    QQmlEngine::setObjectOwnership(tabs, QQmlEngine::CppOwnership);
     return tabs;
 }
 
 QmlClipboard *QmlStaticData::getClipboardSingleton()
 {
     static QmlClipboard *clipboard = new QmlClipboard(this);
+    QQmlEngine::setObjectOwnership(clipboard, QQmlEngine::CppOwnership);
     return clipboard;
 }
 
 QmlWindows *QmlStaticData::getWindowsSingleton()
 {
     static QmlWindows *windows = new QmlWindows(this);
+    QQmlEngine::setObjectOwnership(windows, QQmlEngine::CppOwnership);
     return windows;
 }
 
 QmlExternalJsObject *QmlStaticData::getExternalJsObjectSingleton()
 {
     static QmlExternalJsObject *externalJsObject = new QmlExternalJsObject(this);
+    QQmlEngine::setObjectOwnership(externalJsObject, QQmlEngine::CppOwnership);
     return externalJsObject;
 }
 
 QmlUserScripts *QmlStaticData::getUserScriptsSingleton()
 {
     static QmlUserScripts *userScripts = new QmlUserScripts(this);
+    QQmlEngine::setObjectOwnership(userScripts, QQmlEngine::CppOwnership);
     return userScripts;
 }
diff --git a/src/scripts/helloqml/main.qml b/src/scripts/helloqml/main.qml
index 054faf370..1ee07eeb6 100644
--- a/src/scripts/helloqml/main.qml
+++ b/src/scripts/helloqml/main.qml
@@ -25,7 +25,6 @@ Falkon.PluginInterface {
             id: 'helloQmlObject',
             object: helloQmlObject
         })
-        Falkon.UserScripts.insert(testingHelloQmlUserScript)
     }
 
     testPlugin: function() {