From e02a8ee6645f18a91340d8dac7bcf9152a9ab051 Mon Sep 17 00:00:00 2001
From: Juraj Oravec <jurajoravec@mailo.com>
Date: Fri, 17 Nov 2023 20:58:45 +0100
Subject: [PATCH] Remove Qt5 support

---
 CMakeLists.txt                                | 66 ++++++-------------
 src/lib/3rdparty/fancytabwidget.cpp           |  4 --
 src/lib/3rdparty/fancytabwidget.h             |  4 --
 .../qtsingleapplication/qtlocalpeer.cpp       |  7 --
 src/lib/3rdparty/stylehelper.cpp              |  8 ---
 src/lib/CMakeLists.txt                        | 49 ++++----------
 src/lib/adblock/adblockmanager.cpp            |  4 --
 src/lib/adblock/adblockrule.cpp               |  7 +-
 src/lib/adblock/adblocksubscription.cpp       | 14 +---
 src/lib/app/browserwindow.cpp                 | 14 ----
 src/lib/app/mainapplication.cpp               | 25 -------
 src/lib/app/mainapplication.h                 |  8 ---
 src/lib/autofill/autofill.cpp                 |  3 -
 .../bookmarksexport/htmlexporter.cpp          |  6 +-
 .../bookmarksimport/operaimporter.cpp         |  6 +-
 src/lib/bookmarks/bookmarkstoolbarbutton.cpp  |  4 --
 src/lib/bookmarks/bookmarkstoolbarbutton.h    |  4 --
 src/lib/downloads/downloaditem.cpp            | 22 ++-----
 src/lib/downloads/downloaditem.h              | 14 +---
 src/lib/downloads/downloadmanager.cpp         | 32 +++------
 src/lib/downloads/downloadmanager.h           | 12 ----
 src/lib/downloads/downloadmanagermodel.cpp    |  4 --
 src/lib/downloads/downloadoptionsdialog.cpp   |  6 +-
 src/lib/downloads/downloadoptionsdialog.h     |  8 +--
 .../completer/locationcompleterdelegate.cpp   |  4 --
 .../completer/locationcompleterrefreshjob.cpp |  4 --
 src/lib/navigation/websearchbar.cpp           |  4 --
 src/lib/network/networkmanager.cpp            | 21 +-----
 src/lib/network/networkmanager.h              |  9 ---
 src/lib/opensearch/editsearchengine.cpp       |  4 --
 src/lib/opensearch/searchenginesdialog.cpp    |  4 --
 src/lib/plugins/ocssupport.cpp                |  4 --
 .../qml/api/userscript/qmluserscript.cpp      |  6 --
 .../qml/api/userscript/qmluserscript.h        |  6 +-
 .../qml/api/userscript/qmluserscripts.cpp     |  9 ---
 src/lib/preferences/autofillmanager.cpp       |  8 ---
 src/lib/preferences/preferences.cpp           |  7 --
 src/lib/tabwidget/combotabbar.cpp             |  7 --
 src/lib/tabwidget/combotabbar.h               |  4 --
 src/lib/tools/buttonwithmenu.cpp              |  4 --
 src/lib/tools/desktopfile.cpp                 |  3 -
 .../html5permissionsnotification.cpp          |  4 --
 src/lib/tools/pagethumbnailer.cpp             |  4 --
 src/lib/tools/qztools.cpp                     | 15 -----
 src/lib/webengine/webhittestresult.cpp        | 17 ++---
 src/lib/webengine/webhittestresult.h          |  8 +--
 src/lib/webengine/webpage.cpp                 | 27 --------
 src/lib/webengine/webpage.h                   |  8 +--
 src/lib/webengine/webscrollbarmanager.cpp     |  5 --
 src/lib/webengine/webview.cpp                 | 29 ++------
 src/lib/webtab/searchtoolbar.cpp              |  4 --
 src/plugins/GreaseMonkey/gm_manager.cpp       | 12 ----
 .../kdeframeworksintegrationplugin.h          |  4 --
 .../kioschemehandler.cpp                      |  9 +--
 src/plugins/PyFalkon/CMakeLists.txt           | 18 ++---
 src/plugins/PyFalkon/pyfalkon_global.h        |  4 --
 src/plugins/PyFalkon/typesystem_pyfalkon.xml  |  4 --
 .../StatusBarIcons/sbi_networkicon.cpp        | 26 +-------
 src/plugins/StatusBarIcons/sbi_networkicon.h  |  9 ---
 src/plugins/TabManager/tabmanagerdelegate.cpp |  4 --
 src/plugins/TabManager/tabmanagerwidget.cpp   | 18 -----
 src/plugins/TabManager/tabmanagerwidget.h     |  4 --
 .../TabManager/tabmanagerwidgetcontroller.cpp |  8 ---
 .../TabManager/tldextractor/tldextractor.cpp  |  7 --
 src/plugins/VerticalTabs/tablistview.cpp      |  4 --
 65 files changed, 73 insertions(+), 618 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55f3f8821..d3598047c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,10 @@ set(RELEASE_SERVICE_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}.${RELEASE_SERVICE_
 # Project name and version
 project(Falkon VERSION ${RELEASE_SERVICE_VERSION})
 
+set(KF_MAJOR_VERSION "6")
+set(QT_MIN_VERSION "6.4.0")
+set(KF_MIN_VERSION "5.240.0")
+
 # Find ECM, with nice error handling in case of failure
 include(FeatureSummary)
 find_package(ECM 5.78.0 CONFIG)
@@ -26,15 +30,6 @@ include(ECMSetupVersion)
 include(ECMAddAppIcon)
 include(ECMQtDeclareLoggingCategory)
 include(ECMPoQmTools)
-if (QT_MAJOR_VERSION STREQUAL "6")
-    set(QT_MIN_VERSION "6.4.0")
-    set(KF_MIN_VERSION "5.240.0")
-    set(KF_MAJOR_VERSION "6")
-else()
-    set(QT_MIN_VERSION "5.15.0")
-    set(KF_MIN_VERSION "5.78.0")
-    set(KF_MAJOR_VERSION "5")
-endif()
 
 # Output dirs (like ECM 5.38 does)
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
@@ -60,13 +55,8 @@ add_definitions(-DQT_NO_URL_CAST_FROM_STRING -DQT_USE_QSTRINGBUILDER -DQT_NO_CAS
 
 # Mandatory: Qt5/6
 find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS Core Widgets Network Sql QuickWidgets PrintSupport WebChannel)
-if (QT_MAJOR_VERSION STREQUAL "6")
-    find_package(Qt6WebEngineCore ${QT_MIN_VERSION} REQUIRED)
-    find_package(Qt6WebEngineWidgets ${QT_MIN_VERSION} REQUIRED)
-else()
-    find_package(Qt5WebEngine ${QT_MIN_VERSION} REQUIRED)
-    find_package(Qt5WebEngineWidgets ${QT_MIN_VERSION} REQUIRED)
-endif()
+find_package(Qt6WebEngineCore ${QT_MIN_VERSION} REQUIRED)
+find_package(Qt6WebEngineWidgets ${QT_MIN_VERSION} REQUIRED)
 if (BUILD_TESTING)
     find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS Test)
 endif()
@@ -77,9 +67,6 @@ endif()
 if (UNIX AND NOT APPLE AND NOT NO_X11)
     add_definitions(-DQZ_WS_X11)
     find_package(XCB REQUIRED COMPONENTS XCB UTIL)
-    if (NOT (QT_MAJOR_VERSION STREQUAL "6"))
-        find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS X11Extras)
-    endif()
 endif()
 if (WIN32)
     add_definitions(-DW7API)
@@ -108,14 +95,12 @@ if (WIN32)
     add_definitions(-D_WIN32_WINNT=${ver})
 endif()
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    find_package(Qt6Core5Compat)
-endif()
+find_package(Qt6Core5Compat)
 
 # Mandatory: OpenSSL
 find_package(OpenSSL REQUIRED)
 
-# Mandatory: KF5/6
+# Mandatory: KF6
 find_package(KF${KF_MAJOR_VERSION} REQUIRED COMPONENTS Archive)
 
 # KF5I18n: Mandatory with downloaded translations (only for ki18n_install)
@@ -152,30 +137,17 @@ endif()
 # Optional: PySide2
 option(BUILD_PYTHON_SUPPORT "Support for Python plugins" ON)
 if (BUILD_PYTHON_SUPPORT)
-    if (QT_MAJOR_VERSION STREQUAL "6")
-        # Optional: PySide6
-        find_package(PySide6 "6.4.0")
-        find_package(Shiboken6 "6.4.0")
-        find_package(Shiboken6Tools "6.4.0")
-        find_package(Python3 COMPONENTS Development)
-        set_package_properties(PySide6 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        set_package_properties(Shiboken6 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        set_package_properties(Shiboken6Tools PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        set_package_properties(Python3 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        if (PySide6_FOUND AND Shiboken6_FOUND AND Shiboken6Tools_FOUND AND Python3_FOUND)
-            set(ENABLE_PYTHON_PLUGINS TRUE)
-        endif()
-    else()
-        # Optional: PySide2
-        find_package(PySide2 "2.0.0")
-        find_package(Shiboken2 "2.0.0")
-        find_package(Python3 COMPONENTS Development)
-        set_package_properties(PySide2 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        set_package_properties(Shiboken2 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        set_package_properties(Python3 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
-        if (PySide2_FOUND AND Shiboken2_FOUND AND Python3_FOUND)
-            set(ENABLE_PYTHON_PLUGINS TRUE)
-        endif()
+    # Optional: PySide6
+    find_package(PySide6 "6.4.0")
+    find_package(Shiboken6 "6.4.0")
+    find_package(Shiboken6Tools "6.4.0")
+    find_package(Python3 COMPONENTS Development)
+    set_package_properties(PySide6 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
+    set_package_properties(Shiboken6 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
+    set_package_properties(Shiboken6Tools PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
+    set_package_properties(Python3 PROPERTIES DESCRIPTION "Python plugins" TYPE OPTIONAL)
+    if (PySide6_FOUND AND Shiboken6_FOUND AND Shiboken6Tools_FOUND AND Python3_FOUND)
+        set(ENABLE_PYTHON_PLUGINS TRUE)
     endif()
 endif()
 
diff --git a/src/lib/3rdparty/fancytabwidget.cpp b/src/lib/3rdparty/fancytabwidget.cpp
index 384a64fdf..bda32b962 100644
--- a/src/lib/3rdparty/fancytabwidget.cpp
+++ b/src/lib/3rdparty/fancytabwidget.cpp
@@ -307,11 +307,7 @@ void FancyTabBar::paintEvent(QPaintEvent* event)
     }
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void FancyTab::enterEvent(QEvent*)
-#else
 void FancyTab::enterEvent(QEnterEvent*)
-#endif
 {
     fadeIn();
 }
diff --git a/src/lib/3rdparty/fancytabwidget.h b/src/lib/3rdparty/fancytabwidget.h
index eceff02c8..da6f397be 100644
--- a/src/lib/3rdparty/fancytabwidget.h
+++ b/src/lib/3rdparty/fancytabwidget.h
@@ -86,11 +86,7 @@ public:
     QString text;
 
 protected:
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void enterEvent(QEvent *event) override;
-#else
     void enterEvent(QEnterEvent *event) override;
-#endif
     void leaveEvent(QEvent*) override;
 
 private:
diff --git a/src/lib/3rdparty/qtsingleapplication/qtlocalpeer.cpp b/src/lib/3rdparty/qtsingleapplication/qtlocalpeer.cpp
index 3160d6743..d94af8723 100644
--- a/src/lib/3rdparty/qtsingleapplication/qtlocalpeer.cpp
+++ b/src/lib/3rdparty/qtsingleapplication/qtlocalpeer.cpp
@@ -43,10 +43,7 @@
 #include <QCoreApplication>
 #include <QDataStream>
 #include <QTime>
-
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 #include <QRegExp>
-#endif
 
 #include "../config.h"
 #if defined(Q_OS_LINUX) && !defined(DISABLE_DBUS)
@@ -114,11 +111,7 @@ QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
 #endif
         prefix = id.section(QLatin1Char('/'), -1);
     }
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    prefix.remove(QRegExp("[^a-zA-Z]"));
-#else
     prefix = QRegExp("[^a-zA-Z]").removeIn(prefix);
-#endif
     prefix.truncate(6);
 
     QByteArray idc = id.toUtf8();
diff --git a/src/lib/3rdparty/stylehelper.cpp b/src/lib/3rdparty/stylehelper.cpp
index 9324af89e..c817c760a 100644
--- a/src/lib/3rdparty/stylehelper.cpp
+++ b/src/lib/3rdparty/stylehelper.cpp
@@ -160,11 +160,7 @@ void StyleHelper::verticalGradient(QPainter* painter, const QRect &spanRect, con
                      clipRect.height(), keyColor.rgb());
 
         QPixmap pixmap;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        if (!QPixmapCache::find(key, pixmap)) {
-#else
         if (!QPixmapCache::find(key, &pixmap)) {
-#endif
             pixmap = QPixmap(clipRect.size());
             QPainter p(&pixmap);
             QRect rect(0, 0, clipRect.width(), clipRect.height());
@@ -187,11 +183,7 @@ void StyleHelper::drawIconWithShadow(const QIcon &icon, const QRect &rect,
     QPixmap cache;
     QString pixmapName = QSL("icon %0 %1 %2").arg(icon.cacheKey()).arg(iconMode).arg(rect.height());
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    if (!QPixmapCache::find(pixmapName, cache)) {
-#else
     if (!QPixmapCache::find(pixmapName, &cache)) {
-#endif
         QPixmap px = icon.pixmap(rect.size(), iconMode);
         px.setDevicePixelRatio(qApp->devicePixelRatio());
         cache = QPixmap(px.size() + QSize(radius * 2, radius * 2));
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 964370d07..4ea872344 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -577,41 +577,23 @@ qt_add_resources(SRCS
 
 add_library(FalkonPrivate SHARED ${SRCS} ${LOGGING_SRCS})
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    get_property(QT_WEBENGINE_INCLUDE_DIRS TARGET Qt6::WebEngineCore PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
-else()
-    get_property(QT_WEBENGINE_INCLUDE_DIRS TARGET Qt::WebEngine PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
-endif()
+get_property(QT_WEBENGINE_INCLUDE_DIRS TARGET Qt6::WebEngineCore PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
 
 target_include_directories(FalkonPrivate SYSTEM PUBLIC ${QT_WEBENGINE_INCLUDE_DIRS})
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    target_link_libraries(FalkonPrivate
-        Qt6::Widgets
-        Qt6::WebEngineWidgets
-        Qt6::Network
-        Qt6::NetworkPrivate
-        Qt6::Sql
-        Qt6::PrintSupport
-        Qt6::QuickWidgets
-        Qt6::WebChannel
-        Qt6::Core5Compat
-        KF6::Archive
-        ${OPENSSL_CRYPTO_LIBRARY}
-    )
-else()
-    target_link_libraries(FalkonPrivate
-        Qt::Widgets
-        Qt::WebEngineWidgets
-        Qt::Network
-        Qt::Sql
-        Qt::PrintSupport
-        Qt::QuickWidgets
-        Qt::WebChannel
-        KF5::Archive
-        ${OPENSSL_CRYPTO_LIBRARY}
-    )
-endif()
+target_link_libraries(FalkonPrivate
+    Qt6::Widgets
+    Qt6::WebEngineWidgets
+    Qt6::Network
+    Qt6::NetworkPrivate
+    Qt6::Sql
+    Qt6::PrintSupport
+    Qt6::QuickWidgets
+    Qt6::WebChannel
+    Qt6::Core5Compat
+    KF6::Archive
+    ${OPENSSL_CRYPTO_LIBRARY}
+)
 
 if (HAVE_LIBINTL)
     target_include_directories(FalkonPrivate SYSTEM PUBLIC ${Intl_INCLUDE_DIRS})
@@ -621,9 +603,6 @@ endif()
 if (UNIX AND NOT APPLE)
     if (NOT NO_X11)
         target_link_libraries(FalkonPrivate XCB::XCB)
-        if (NOT (QT_MAJOR_VERSION STREQUAL "6"))
-            target_link_libraries(FalkonPrivate Qt::X11Extras)
-        endif()
     endif()
 
     set_target_properties(FalkonPrivate PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION "3")
diff --git a/src/lib/adblock/adblockmanager.cpp b/src/lib/adblock/adblockmanager.cpp
index 6d36445a7..353e706bb 100644
--- a/src/lib/adblock/adblockmanager.cpp
+++ b/src/lib/adblock/adblockmanager.cpp
@@ -296,11 +296,7 @@ void AdBlockManager::load()
         }
 
         QTextStream textStream(&file);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        textStream.setCodec("UTF-8");
-#else
         textStream.setEncoding(QStringConverter::Utf8);
-#endif
         QString title = textStream.readLine(1024).remove(QLatin1String("Title: "));
         QUrl url = QUrl(textStream.readLine(1024).remove(QLatin1String("Url: ")));
 
diff --git a/src/lib/adblock/adblockrule.cpp b/src/lib/adblock/adblockrule.cpp
index e36cedea7..80ae71bb8 100644
--- a/src/lib/adblock/adblockrule.cpp
+++ b/src/lib/adblock/adblockrule.cpp
@@ -53,16 +53,12 @@
 #include <QWebEnginePage>
 #include <QWebEngineUrlRequestInfo>
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+/* TODO Qt6 Replace with PUBLIC API */
 #include <QtCore/private/qurl_p.h>
 #include <QtNetwork/private/qtldurl_p.h>
-#endif
 
 static QString getTopLevelDomain(const QUrl &url)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return url.topLevelDomain();
-#else
     // QUrl::topLevelDomain() was removed in Qt6.
     // The following is copied from the old "qTopLevelDomain" code in Qt6::Network.
     // It was removed in this commit: https://github.com/qt/qtbase/commit/50b30976837be0969efdccced68cfb584d99981a
@@ -81,7 +77,6 @@ static QString getTopLevelDomain(const QUrl &url)
     //return qt_ACE_do(tld, ToAceOnly, AllowLeadingDot, {});
     // TODO QT6 - QUrl::toAce() uses ForbidLeadingDot, while the old QUrl::topLevelDomain() used AllowLeadingDot. Does this matter?
     return QString(QUrl::toAce(tld));
-#endif
 }
 
 static QString toSecondLevelDomain(const QUrl &url)
diff --git a/src/lib/adblock/adblocksubscription.cpp b/src/lib/adblock/adblocksubscription.cpp
index 4ef128ea2..a2e21987c 100644
--- a/src/lib/adblock/adblocksubscription.cpp
+++ b/src/lib/adblock/adblocksubscription.cpp
@@ -103,11 +103,7 @@ void AdBlockSubscription::loadSubscription(const QStringList &disabledRules)
     }
 
     QTextStream textStream(&file);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        textStream.setCodec("UTF-8");
-#else
-        textStream.setEncoding(QStringConverter::Utf8);
-#endif
+    textStream.setEncoding(QStringConverter::Utf8);
     // Header is on 3rd line
     textStream.readLine(1024);
     textStream.readLine(1024);
@@ -310,11 +306,7 @@ void AdBlockCustomList::loadSubscription(const QStringList &disabledRules)
 
     if (file.open(QFile::WriteOnly | QFile::Append)) {
         QTextStream stream(&file);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        stream.setCodec("UTF-8");
-#else
         stream.setEncoding(QStringConverter::Utf8);
-#endif
 
         if (!rules.contains(ddg1 + QL1S("\n")))
             stream << ddg1 << Qt::endl;
@@ -337,11 +329,7 @@ void AdBlockCustomList::saveSubscription()
     }
 
     QTextStream textStream(&file);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    textStream.setCodec("UTF-8");
-#else
     textStream.setEncoding(QStringConverter::Utf8);
-#endif
     textStream << "Title: " << title() << Qt::endl;
     textStream << "Url: " << url().toString() << Qt::endl;
     textStream << "[Adblock Plus 1.1.1]" << Qt::endl;
diff --git a/src/lib/app/browserwindow.cpp b/src/lib/app/browserwindow.cpp
index b4b5feec3..884e5a97d 100644
--- a/src/lib/app/browserwindow.cpp
+++ b/src/lib/app/browserwindow.cpp
@@ -72,9 +72,6 @@
 #include <QWebEngineHistory>
 #include <QWebEngineSettings>
 #include <QMessageBox>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QDesktopWidget>
-#endif
 #include <QToolTip>
 #include <QScrollArea>
 #include <QCollator>
@@ -82,9 +79,6 @@
 #include <QActionGroup>
 
 #ifdef QZ_WS_X11
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QX11Info>
-#endif
 #include <xcb/xcb.h>
 #include <xcb/xcb_atom.h>
 #endif
@@ -405,11 +399,7 @@ void BrowserWindow::setupUi()
     m_statusBar->addButton(downloadsButton);
     m_navigationToolbar->addToolButton(downloadsButton);
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QDesktopWidget* desktop = mApp->desktop();
-#else
     auto desktop = QGuiApplication::primaryScreen();
-#endif
     int windowWidth = desktop->availableGeometry().width() / 1.3;
     int windowHeight = desktop->availableGeometry().height() / 1.3;
 
@@ -1573,14 +1563,10 @@ void BrowserWindow::closeTab()
 #ifdef QZ_WS_X11
 static xcb_connection_t *getXcbConnection()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return QX11Info::connection();
-#else
     const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
     if (x11App == nullptr)
         return 0;
     return x11App->connection();
-#endif
 }
 
 int BrowserWindow::getCurrentVirtualDesktop() const
diff --git a/src/lib/app/mainapplication.cpp b/src/lib/app/mainapplication.cpp
index a769318cb..5d312f3f4 100644
--- a/src/lib/app/mainapplication.cpp
+++ b/src/lib/app/mainapplication.cpp
@@ -62,9 +62,6 @@
 #include <QDir>
 #include <QStandardPaths>
 #include <QWebEngineProfile>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineDownloadItem>
-#endif
 #include <QWebEngineScriptCollection>
 #include <QRegularExpression>
 #include <QtWebEngineWidgetsVersion>
@@ -298,11 +295,7 @@ MainApplication::MainApplication(int &argc, char** argv)
     NetworkManager::registerSchemes();
     registerAllowedSchemes();
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    m_webProfile = isPrivate() ? new QWebEngineProfile() : QWebEngineProfile::defaultProfile();
-#else
     m_webProfile = isPrivate() ? new QWebEngineProfile() : new QWebEngineProfile(QSL("Default"));
-#endif
     connect(m_webProfile, &QWebEngineProfile::downloadRequested, this, &MainApplication::downloadRequested);
 
     m_webProfile->setNotificationPresenter([&] (std::unique_ptr<QWebEngineNotification> notification) {
@@ -408,11 +401,9 @@ MainApplication::~MainApplication()
     delete m_cookieJar;
     m_cookieJar = nullptr;
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     // On Qt 6, deleting the web profile is necessary in order to make sure cache, cookies, etc. are flushed to disk.
     delete m_webProfile;
     m_webProfile = nullptr;
-#endif
 
     Settings::syncSettings();
 }
@@ -946,11 +937,7 @@ void MainApplication::runDeferredPostLaunchActions()
     checkOptimizeDatabase();
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void MainApplication::downloadRequested(QWebEngineDownloadItem *download)
-#else
 void MainApplication::downloadRequested(QWebEngineDownloadRequest *download)
-#endif
 {
     downloadManager()->download(download);
 }
@@ -1016,11 +1003,7 @@ void MainApplication::loadSettings()
     webSettings->setFontSize(QWebEngineSettings::MinimumLogicalFontSize, settings.value(QSL("MinimumLogicalFontSize"), 5).toInt());
     settings.endGroup();
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QWebEngineProfile* profile = QWebEngineProfile::defaultProfile();
-#else
     QWebEngineProfile* profile = m_webProfile;
-#endif
     profile->setPersistentCookiesPolicy(QWebEngineProfile::AllowPersistentCookies);
     profile->setPersistentStoragePath(DataPaths::currentProfilePath());
 
@@ -1210,17 +1193,9 @@ void MainApplication::setUserStyleSheet(const QString &filePath)
     userCss += QzTools::readAllFileContents(filePath).remove(QLatin1Char('\n'));
 
     const QString name = QStringLiteral("_falkon_userstylesheet");
-
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QWebEngineScript oldScript = m_webProfile->scripts()->findScript(name);
-    if (!oldScript.isNull()) {
-        m_webProfile->scripts()->remove(oldScript);
-    }
-#else
     for (const QWebEngineScript &oldScript : m_webProfile->scripts()->find(name)) {
         m_webProfile->scripts()->remove(oldScript);
     }
-#endif
 
     if (userCss.isEmpty())
         return;
diff --git a/src/lib/app/mainapplication.h b/src/lib/app/mainapplication.h
index aea5c8270..4003ac65f 100644
--- a/src/lib/app/mainapplication.h
+++ b/src/lib/app/mainapplication.h
@@ -31,11 +31,7 @@ class QMenu;
 class QWebEngineProfile;
 class QWebEngineSettings;
 class QNetworkAccessManager;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-class QWebEngineDownloadItem;
-#else
 class QWebEngineDownloadRequest;
-#endif
 
 class History;
 class AutoFill;
@@ -150,11 +146,7 @@ private Q_SLOTS:
     void onFocusChanged();
     void runDeferredPostLaunchActions();
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void downloadRequested(QWebEngineDownloadItem *download);
-#else
     void downloadRequested(QWebEngineDownloadRequest *download);
-#endif
 
 private:
     enum PostLaunchAction {
diff --git a/src/lib/autofill/autofill.cpp b/src/lib/autofill/autofill.cpp
index 3f5bcc199..dae78dc1c 100644
--- a/src/lib/autofill/autofill.cpp
+++ b/src/lib/autofill/autofill.cpp
@@ -249,9 +249,6 @@ QByteArray AutoFill::exportPasswords()
     QByteArray output;
 
     QXmlStreamWriter stream(&output);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        stream.setCodec("UTF-8");
-#endif
     stream.setAutoFormatting(true);
 
     stream.writeStartDocument();
diff --git a/src/lib/bookmarks/bookmarksexport/htmlexporter.cpp b/src/lib/bookmarks/bookmarksexport/htmlexporter.cpp
index e0e78e994..38f4fb770 100644
--- a/src/lib/bookmarks/bookmarksexport/htmlexporter.cpp
+++ b/src/lib/bookmarks/bookmarksexport/htmlexporter.cpp
@@ -49,11 +49,7 @@ bool HtmlExporter::exportBookmarks(BookmarkItem* root)
     }
 
     QTextStream stream(&file);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        stream.setCodec("UTF-8");
-#else
-        stream.setEncoding(QStringConverter::Utf8);
-#endif
+    stream.setEncoding(QStringConverter::Utf8);
 
     stream << "<!DOCTYPE NETSCAPE-Bookmark-file-1>" << Qt::endl;
     stream << "<!-- This is an automatically generated file." << Qt::endl;
diff --git a/src/lib/bookmarks/bookmarksimport/operaimporter.cpp b/src/lib/bookmarks/bookmarksimport/operaimporter.cpp
index e8dd2d4d3..427952f83 100644
--- a/src/lib/bookmarks/bookmarksimport/operaimporter.cpp
+++ b/src/lib/bookmarks/bookmarksimport/operaimporter.cpp
@@ -25,11 +25,7 @@
 OperaImporter::OperaImporter(QObject* parent)
     : BookmarksImporter(parent)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        m_stream.setCodec("UTF-8");
-#else
-        m_stream.setEncoding(QStringConverter::Utf8);
-#endif
+    m_stream.setEncoding(QStringConverter::Utf8);
 }
 
 QString OperaImporter::description() const
diff --git a/src/lib/bookmarks/bookmarkstoolbarbutton.cpp b/src/lib/bookmarks/bookmarkstoolbarbutton.cpp
index 8f6c6a016..15ca4c114 100644
--- a/src/lib/bookmarks/bookmarkstoolbarbutton.cpp
+++ b/src/lib/bookmarks/bookmarkstoolbarbutton.cpp
@@ -256,11 +256,7 @@ QString BookmarksToolbarButton::createTooltip() const
     return m_bookmark->urlString();
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void BookmarksToolbarButton::enterEvent(QEvent* event)
-#else
 void BookmarksToolbarButton::enterEvent(QEnterEvent* event)
-#endif
 {
     QPushButton::enterEvent(event);
 
diff --git a/src/lib/bookmarks/bookmarkstoolbarbutton.h b/src/lib/bookmarks/bookmarkstoolbarbutton.h
index 13df1e34c..c3e5a6a6e 100644
--- a/src/lib/bookmarks/bookmarkstoolbarbutton.h
+++ b/src/lib/bookmarks/bookmarkstoolbarbutton.h
@@ -63,11 +63,7 @@ private:
     void init();
     QString createTooltip() const;
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void enterEvent(QEvent *event) override;
-#else
     void enterEvent(QEnterEvent *event) override;
-#endif
     void leaveEvent(QEvent* event) override;
     void mousePressEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
diff --git a/src/lib/downloads/downloaditem.cpp b/src/lib/downloads/downloaditem.cpp
index 7aec65db0..d95efa8a7 100644
--- a/src/lib/downloads/downloaditem.cpp
+++ b/src/lib/downloads/downloaditem.cpp
@@ -35,11 +35,7 @@
 #include <QMessageBox>
 #include <QFileIconProvider>
 #include <QDesktopServices>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineDownloadItem>
-#else
 #include <QWebEngineDownloadRequest>
-#endif
 #include <QtWebEngineWidgetsVersion>
 
 #ifdef Q_OS_WIN
@@ -49,7 +45,7 @@
 
 //#define DOWNMANAGER_DEBUG
 
-DownloadItem::DownloadItem(QListWidgetItem *item, Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS* downloadItem, const QString &path, const QString &fileName, bool openFile, DownloadManager* manager)
+DownloadItem::DownloadItem(QListWidgetItem *item, QWebEngineDownloadRequest* downloadItem, const QString &path, const QString &fileName, bool openFile, DownloadManager* manager)
     : QWidget()
     , ui(new Ui::DownloadItem)
     , m_item(item)
@@ -85,14 +81,9 @@ DownloadItem::DownloadItem(QListWidgetItem *item, Q_WEB_ENGINE_DOWNLOAD_ITEM_CLA
 
 void DownloadItem::startDownloading()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    connect(m_download, &QWebEngineDownloadItem::finished, this, &DownloadItem::finished);
-    connect(m_download, &QWebEngineDownloadItem::downloadProgress, this, &DownloadItem::downloadProgress);
-#else
     connect(m_download, &QWebEngineDownloadRequest::isFinishedChanged, this, &DownloadItem::finished);
     connect(m_download, &QWebEngineDownloadRequest::receivedBytesChanged, this, &DownloadItem::receivedOrTotalBytesChanged);
     connect(m_download, &QWebEngineDownloadRequest::totalBytesChanged, this, &DownloadItem::receivedOrTotalBytesChanged);
-#endif
 
     m_downloading = true;
     if (!m_downTimer.isValid()) {
@@ -133,16 +124,16 @@ void DownloadItem::finished()
     QString host = m_download->url().host();
 
     switch (m_download->state()) {
-    case Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::DownloadCompleted:
+    case QWebEngineDownloadRequest::DownloadCompleted:
         success = true;
         ui->downloadInfo->setText(tr("Done - %1 (%2)").arg(host, QLocale().toString(QDateTime::currentDateTime(), QLocale::ShortFormat)));
         break;
 
-    case Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::DownloadInterrupted:
+    case QWebEngineDownloadRequest::DownloadInterrupted:
         ui->downloadInfo->setText(tr("Error - %1").arg(host));
         break;
 
-    case Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::DownloadCancelled:
+    case QWebEngineDownloadRequest::DownloadCancelled:
         ui->downloadInfo->setText(tr("Cancelled - %1").arg(host));
         break;
 
@@ -164,15 +155,10 @@ void DownloadItem::finished()
     Q_EMIT downloadFinished(true);
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void DownloadItem::downloadProgress(qint64 received, qint64 total)
-{
-#else
 void DownloadItem::receivedOrTotalBytesChanged()
 {
     qint64 received = m_download->receivedBytes();
     qint64 total = m_download->totalBytes();
-#endif
 #ifdef DOWNMANAGER_DEBUG
     qDebug() << __FUNCTION__ << received << total;
 #endif
diff --git a/src/lib/downloads/downloaditem.h b/src/lib/downloads/downloaditem.h
index b3319c50a..c8b2435ce 100644
--- a/src/lib/downloads/downloaditem.h
+++ b/src/lib/downloads/downloaditem.h
@@ -35,13 +35,7 @@ class DownloadItem;
 }
 
 class QListWidgetItem;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-class QWebEngineDownloadItem;
-#define Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS QWebEngineDownloadItem
-#else
 class QWebEngineDownloadRequest;
-#define Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS QWebEngineDownloadRequest
-#endif
 
 class DownloadManager;
 
@@ -50,7 +44,7 @@ class FALKON_EXPORT DownloadItem : public QWidget
     Q_OBJECT
 
 public:
-    explicit DownloadItem(QListWidgetItem* item, Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS* downloadItem, const QString &path, const QString &fileName, bool openFile, DownloadManager* manager);
+    explicit DownloadItem(QListWidgetItem* item, QWebEngineDownloadRequest* downloadItem, const QString &path, const QString &fileName, bool openFile, DownloadManager* manager);
     bool isDownloading() const { return m_downloading; }
     bool isCancelled();
     QTime remainingTime() const { return m_remTime; }
@@ -75,11 +69,7 @@ Q_SIGNALS:
 private Q_SLOTS:
     void parentResized(const QSize &size);
     void finished();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void downloadProgress(qint64 received, qint64 total);
-#else
     void receivedOrTotalBytesChanged();
-#endif
     void stop();
     void pauseResume();
     void openFile();
@@ -96,7 +86,7 @@ private:
     Ui::DownloadItem* ui;
 
     QListWidgetItem* m_item;
-    Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS* m_download;
+    QWebEngineDownloadRequest* m_download;
     QString m_path;
     QString m_fileName;
     QElapsedTimer m_downTimer;
diff --git a/src/lib/downloads/downloadmanager.cpp b/src/lib/downloads/downloadmanager.cpp
index b9e46db20..15004b1b8 100644
--- a/src/lib/downloads/downloadmanager.cpp
+++ b/src/lib/downloads/downloadmanager.cpp
@@ -40,11 +40,7 @@
 #include <QShortcut>
 #include <QStandardPaths>
 #include <QWebEngineHistory>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineDownloadItem>
-#else
 #include <QWebEngineDownloadRequest>
-#endif
 #include <QtWebEngineWidgetsVersion>
 
 #ifdef Q_OS_WIN
@@ -127,11 +123,7 @@ void DownloadManager::keyPressEvent(QKeyEvent* e)
     QWidget::keyPressEvent(e);
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void DownloadManager::closeDownloadTab(QWebEngineDownloadItem *item) const
-#else
 void DownloadManager::closeDownloadTab(QWebEngineDownloadRequest *item) const
-#endif
 {
     // Attempt to close empty tab that was opened only for loading the download url
     auto testWebView = [](TabbedWebView *view, const QUrl &url) {
@@ -266,7 +258,7 @@ void DownloadManager::clearList()
     Q_EMIT downloadsCountChanged();
 }
 
-void DownloadManager::download(Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem)
+void DownloadManager::download(QWebEngineDownloadRequest *downloadItem)
 {
     QElapsedTimer downloadTimer;
     downloadTimer.start();
@@ -276,13 +268,9 @@ void DownloadManager::download(Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem)
     QString downloadPath;
     bool openFile = false;
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const QString fileName = QFileInfo(downloadItem->path()).fileName();
-#else
     const QString fileName = downloadItem->downloadFileName();
-#endif
 
-    const bool forceAsk = downloadItem->savePageFormat() != Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::UnknownSaveFormat
+    const bool forceAsk = downloadItem->savePageFormat() != QWebEngineDownloadRequest::UnknownSaveFormat
             || downloadItem->isSavePageDownload();
 
     if (m_useExternalManager) {
@@ -291,7 +279,7 @@ void DownloadManager::download(Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem)
         enum Result { Open = 1, Save = 2, ExternalManager = 3, SavePage = 4, Unknown = 0 };
         Result result = Unknown;
 
-        if (downloadItem->savePageFormat() != Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::UnknownSaveFormat) {
+        if (downloadItem->savePageFormat() != QWebEngineDownloadRequest::UnknownSaveFormat) {
             // Save Page requested
             result = SavePage;
         } else if (downloadItem->isSavePageDownload()) {
@@ -338,17 +326,17 @@ void DownloadManager::download(Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem)
                 Settings().setValue(QSL("DownloadManager/lastDownloadPath"), m_lastDownloadPath);
                 m_lastDownloadOption = SaveFile;
 
-                Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::SavePageFormat format = Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::UnknownSaveFormat;
+                QWebEngineDownloadRequest::SavePageFormat format = QWebEngineDownloadRequest::UnknownSaveFormat;
 
                 if (selectedFilter == mhtml) {
-                    format = Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::MimeHtmlSaveFormat;
+                    format = QWebEngineDownloadRequest::MimeHtmlSaveFormat;
                 } else if (selectedFilter == htmlSingle) {
-                    format = Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::SingleHtmlSaveFormat;
+                    format = QWebEngineDownloadRequest::SingleHtmlSaveFormat;
                 } else if (selectedFilter == htmlComplete) {
-                    format = Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::CompleteHtmlSaveFormat;
+                    format = QWebEngineDownloadRequest::CompleteHtmlSaveFormat;
                 }
 
-                if (format != Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS::UnknownSaveFormat) {
+                if (format != QWebEngineDownloadRequest::UnknownSaveFormat) {
                     downloadItem->setSavePageFormat(format);
                 }
             }
@@ -373,12 +361,8 @@ void DownloadManager::download(Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem)
     }
 
     // Set download path and accept
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    downloadItem->setPath(downloadPath);
-#else
     downloadItem->setDownloadDirectory(QFileInfo(downloadPath).absoluteDir().absolutePath());
     downloadItem->setDownloadFileName(QFileInfo(downloadPath).fileName());
-#endif
     downloadItem->accept();
 
     // Create download item
diff --git a/src/lib/downloads/downloadmanager.h b/src/lib/downloads/downloadmanager.h
index d53d0cd39..b02d3edc7 100644
--- a/src/lib/downloads/downloadmanager.h
+++ b/src/lib/downloads/downloadmanager.h
@@ -32,11 +32,7 @@ class DownloadManager;
 class QUrl;
 class QNetworkAccessManager;
 class QListWidgetItem;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-class QWebEngineDownloadItem;
-#else
 class QWebEngineDownloadRequest;
-#endif
 class QWinTaskbarButton;
 
 class DownloadItem;
@@ -69,11 +65,7 @@ public:
 
     void loadSettings();
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void download(QWebEngineDownloadItem *downloadItem);
-#else
     void download(QWebEngineDownloadRequest *downloadItem);
-#endif
 
     int downloadsCount() const;
     int activeDownloadsCount() const;
@@ -106,11 +98,7 @@ private:
     void resizeEvent(QResizeEvent* e) override;
     void keyPressEvent(QKeyEvent* e) override;
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void closeDownloadTab(QWebEngineDownloadItem *item) const;
-#else
     void closeDownloadTab(QWebEngineDownloadRequest *item) const;
-#endif
     QWinTaskbarButton *taskbarButton();
 
     Ui::DownloadManager* ui;
diff --git a/src/lib/downloads/downloadmanagermodel.cpp b/src/lib/downloads/downloadmanagermodel.cpp
index fb35ead16..9d040419f 100644
--- a/src/lib/downloads/downloadmanagermodel.cpp
+++ b/src/lib/downloads/downloadmanagermodel.cpp
@@ -33,11 +33,7 @@ QVariant DownloadManagerModel::data(const QModelIndex &index, int role) const
 {
     if (role == Qt::DisplayRole) {
         const DownloadItem *item = m_downloads.at(index.row());
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        return item;
-#else
         return QVariant::fromValue(item);
-#endif
     }
     return QVariant();
 }
diff --git a/src/lib/downloads/downloadoptionsdialog.cpp b/src/lib/downloads/downloadoptionsdialog.cpp
index 18f20a776..6b892426c 100644
--- a/src/lib/downloads/downloadoptionsdialog.cpp
+++ b/src/lib/downloads/downloadoptionsdialog.cpp
@@ -21,13 +21,9 @@
 
 #include <QClipboard>
 #include <QMimeDatabase>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineDownloadItem>
-#else
 #include <QWebEngineDownloadRequest>
-#endif
 
-DownloadOptionsDialog::DownloadOptionsDialog(const QString &fileName, Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem, QWidget *parent)
+DownloadOptionsDialog::DownloadOptionsDialog(const QString &fileName, QWebEngineDownloadRequest *downloadItem, QWidget *parent)
     : QDialog(parent)
     , ui(new Ui::DownloadOptionsDialog)
     , m_downloadItem(downloadItem)
diff --git a/src/lib/downloads/downloadoptionsdialog.h b/src/lib/downloads/downloadoptionsdialog.h
index aabddd1e6..f3ef87aed 100644
--- a/src/lib/downloads/downloadoptionsdialog.h
+++ b/src/lib/downloads/downloadoptionsdialog.h
@@ -30,18 +30,14 @@ namespace Ui
 class DownloadOptionsDialog;
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-class QWebEngineDownloadItem;
-#else
 class QWebEngineDownloadRequest;
-#endif
 
 class FALKON_EXPORT DownloadOptionsDialog : public QDialog
 {
     Q_OBJECT
 
 public:
-    explicit DownloadOptionsDialog(const QString &fileName, Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *downloadItem, QWidget* parent = nullptr);
+    explicit DownloadOptionsDialog(const QString &fileName, QWebEngineDownloadRequest *downloadItem, QWidget* parent = nullptr);
     ~DownloadOptionsDialog() override;
 
     void showExternalManagerOption(bool show);
@@ -61,7 +57,7 @@ Q_SIGNALS:
 private:
     Ui::DownloadOptionsDialog* ui;
 
-    Q_WEB_ENGINE_DOWNLOAD_ITEM_CLASS *m_downloadItem;
+    QWebEngineDownloadRequest *m_downloadItem;
     bool m_signalEmited;
 };
 
diff --git a/src/lib/navigation/completer/locationcompleterdelegate.cpp b/src/lib/navigation/completer/locationcompleterdelegate.cpp
index 1add6fa7f..436423896 100644
--- a/src/lib/navigation/completer/locationcompleterdelegate.cpp
+++ b/src/lib/navigation/completer/locationcompleterdelegate.cpp
@@ -324,11 +324,7 @@ int LocationCompleterDelegate::viewItemDrawText(QPainter *p, const QStyleOptionV
                 highlightParts << highlightedPart;
             }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            textLayout.setFormats(QVector<QTextLayout::FormatRange>::fromList(highlightParts));
-#else
             textLayout.setFormats(highlightParts);
-#endif
         }
     }
 
diff --git a/src/lib/navigation/completer/locationcompleterrefreshjob.cpp b/src/lib/navigation/completer/locationcompleterrefreshjob.cpp
index ab07db190..4204c6133 100644
--- a/src/lib/navigation/completer/locationcompleterrefreshjob.cpp
+++ b/src/lib/navigation/completer/locationcompleterrefreshjob.cpp
@@ -40,11 +40,7 @@ LocationCompleterRefreshJob::LocationCompleterRefreshJob(const QString &searchSt
     m_watcher = new QFutureWatcher<void>(this);
     connect(m_watcher, &QFutureWatcherBase::finished, this, &LocationCompleterRefreshJob::slotFinished);
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QFuture<void> future = QtConcurrent::run(this, &LocationCompleterRefreshJob::runJob);
-#else
     QFuture<void> future = QtConcurrent::run(&LocationCompleterRefreshJob::runJob, this);
-#endif
     m_watcher->setFuture(future);
 }
 
diff --git a/src/lib/navigation/websearchbar.cpp b/src/lib/navigation/websearchbar.cpp
index 5533ff44f..589ec0de1 100644
--- a/src/lib/navigation/websearchbar.cpp
+++ b/src/lib/navigation/websearchbar.cpp
@@ -178,11 +178,7 @@ void WebSearchBar::setupEngines()
         item.icon = en.icon;
         item.text = en.name;
         QVariant v;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        v.setValue<SearchEngine>(en);
-#else
         v.setValue(en);
-#endif
         item.userData = v;
 
         m_boxSearchType->addItem(item);
diff --git a/src/lib/network/networkmanager.cpp b/src/lib/network/networkmanager.cpp
index 92fe858b5..0ad040737 100644
--- a/src/lib/network/networkmanager.cpp
+++ b/src/lib/network/networkmanager.cpp
@@ -70,19 +70,10 @@ NetworkManager::NetworkManager(QObject *parent)
     });
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-bool NetworkManager::certificateError(const QWebEngineCertificateError &error, QWidget *parent)
-#else
 bool NetworkManager::certificateError(QWebEngineCertificateError &error, QWidget *parent)
-#endif
 {
     const QString &host = error.url().host();
-
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const auto errorType = error.error();
-#else
     const auto errorType = error.type();
-#endif
 
     if (m_rejectedSslErrors.contains(host) && m_rejectedSslErrors.value(host) == errorType) {
         return false;
@@ -93,21 +84,15 @@ bool NetworkManager::certificateError(QWebEngineCertificateError &error, QWidget
         return true;
     }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     // Defer loading the URL until the user prompt has completed.
     if (error.isOverridable())
         error.defer();
-#endif
 
     QString title = tr("SSL Certificate Error!");
     QString text1 = tr("The page you are trying to access has the following errors in the SSL certificate:");
     QString text2 = tr("Would you like to make an exception for this certificate?");
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const auto errorDescription = error.errorDescription();
-#else
     const auto errorDescription = error.description();
-#endif
     QString message = QSL("<b>%1</b><p>%2</p><ul><li>%3</li></ul><p>%4</p>").arg(title, text1, errorDescription, text2);
 
     SslErrorDialog dialog(parent);
@@ -350,11 +335,7 @@ void NetworkManager::registerSchemes()
 QNetworkReply *NetworkManager::createRequest(QNetworkAccessManager::Operation op, const QNetworkRequest &request, QIODevice *outgoingData)
 {
     QNetworkRequest req = request;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    // These have either been removed or changed to the default in Qt 6.
-    req.setAttribute(QNetworkRequest::SpdyAllowedAttribute, true);
-    req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
-#endif
+    /* TODO Use HTTP2 */
 
     return QNetworkAccessManager::createRequest(op, req, outgoingData);
 }
diff --git a/src/lib/network/networkmanager.h b/src/lib/network/networkmanager.h
index ff2d9a745..4fd89923c 100644
--- a/src/lib/network/networkmanager.h
+++ b/src/lib/network/networkmanager.h
@@ -35,11 +35,7 @@ class FALKON_EXPORT NetworkManager : public QNetworkAccessManager
 public:
     explicit NetworkManager(QObject *parent = nullptr);
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    bool certificateError(const QWebEngineCertificateError &error, QWidget *parent = nullptr);
-#else
     bool certificateError(QWebEngineCertificateError &error, QWidget *parent = nullptr);
-#endif
     void authentication(const QUrl &url, QAuthenticator *auth, QWidget *parent = nullptr);
     void proxyAuthentication(const QString &proxyHost, QAuthenticator *auth, QWidget *parent = nullptr);
 
@@ -62,13 +58,8 @@ private:
 
     NetworkUrlInterceptor *m_urlInterceptor;
     ExtensionSchemeManager *m_extensionScheme;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QHash<QString, QWebEngineCertificateError::Error> m_ignoredSslErrors;
-    QHash<QString, QWebEngineCertificateError::Error> m_rejectedSslErrors;
-#else
     QHash<QString, QWebEngineCertificateError::Type> m_ignoredSslErrors;
     QHash<QString, QWebEngineCertificateError::Type> m_rejectedSslErrors;
-#endif
     QStringList m_ignoredSslHosts;
 };
 
diff --git a/src/lib/opensearch/editsearchengine.cpp b/src/lib/opensearch/editsearchengine.cpp
index ad1b684a3..32110305e 100644
--- a/src/lib/opensearch/editsearchengine.cpp
+++ b/src/lib/opensearch/editsearchengine.cpp
@@ -81,11 +81,7 @@ void EditSearchEngine::setShortcut(const QString &shortcut)
 
 QIcon EditSearchEngine::icon()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return QIcon(*ui->icon->pixmap());
-#else
     return QIcon(ui->icon->pixmap());
-#endif
 }
 
 void EditSearchEngine::setIcon(const QIcon &icon)
diff --git a/src/lib/opensearch/searchenginesdialog.cpp b/src/lib/opensearch/searchenginesdialog.cpp
index d5bd756b2..5db34ce35 100644
--- a/src/lib/opensearch/searchenginesdialog.cpp
+++ b/src/lib/opensearch/searchenginesdialog.cpp
@@ -173,11 +173,7 @@ SearchEngine SearchEnginesDialog::getEngine(QTreeWidgetItem* item)
 void SearchEnginesDialog::setEngine(QTreeWidgetItem* item, const SearchEngine &engine)
 {
     QVariant v;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    v.setValue<SearchEngine>(engine);
-#else
     v.setValue(engine);
-#endif
     item->setData(0, EngineRole, v);
     item->setText(0, engine.name);
 }
diff --git a/src/lib/plugins/ocssupport.cpp b/src/lib/plugins/ocssupport.cpp
index d153620e5..79919e7cb 100644
--- a/src/lib/plugins/ocssupport.cpp
+++ b/src/lib/plugins/ocssupport.cpp
@@ -28,11 +28,7 @@
 #include <QUrlQuery>
 #include <QNetworkReply>
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <KArchive/KZip>
-#else
 #include <KZip>
-#endif
 
 Q_GLOBAL_STATIC(OcsSupport, qz_ocs_support)
 
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscript.cpp b/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
index 2638a368a..1a1258b01 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
+++ b/src/lib/plugins/qml/api/userscript/qmluserscript.cpp
@@ -20,9 +20,7 @@
 
 QmlUserScript::QmlUserScript(QObject *parent)
     : QObject(parent)
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     , m_isNull(true)
-#endif
 {
 }
 
@@ -44,11 +42,7 @@ void QmlUserScript::setWebEngineScript(const QWebEngineScript &script)
 
 bool QmlUserScript::null() const
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return m_webEngineScript.isNull();
-#else
     return m_isNull;
-#endif
 }
 
 QString QmlUserScript::name() const
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscript.h b/src/lib/plugins/qml/api/userscript/qmluserscript.h
index 378440b16..b1e087327 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscript.h
+++ b/src/lib/plugins/qml/api/userscript/qmluserscript.h
@@ -100,10 +100,8 @@ Q_SIGNALS:
     void injectionPointChanged(int injectionPoint);
 private:
     QWebEngineScript m_webEngineScript;
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
-    bool m_isNull;
-#endif
     QBasicTimer m_basicTimer;
+    bool m_isNull;
 
     bool null() const;
     QString name() const;
@@ -122,9 +120,7 @@ private:
 
     void setNotNull()
     {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
         // TODO QT6: This is a really hacky way of keeping track of whether the script has been initialized - and is it even necessary?
         m_isNull = false;
-#endif
     }
 };
diff --git a/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp b/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
index 1fa2bf1fc..d418b2c7f 100644
--- a/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
+++ b/src/lib/plugins/qml/api/userscript/qmluserscripts.cpp
@@ -67,26 +67,17 @@ QObject *QmlUserScripts::findScript(const QString &name) const
 {
     auto *qmlUserScript = new QmlUserScript();
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QWebEngineScript webEngineScript = mApp->webProfile()->scripts()->findScript(name);
-    qmlUserScript->setWebEngineScript(webEngineScript);
-#else
     auto scripts = mApp->webProfile()->scripts()->find(name);
     if (!scripts.empty()) {
         qmlUserScript->setWebEngineScript(scripts.first());
     }
-#endif
 
     return qmlUserScript;
 }
 
 QList<QObject*> QmlUserScripts::findScripts(const QString &name) const
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QList<QWebEngineScript> list = mApp->webProfile()->scripts()->findScripts(name);
-#else
     QList<QWebEngineScript> list = mApp->webProfile()->scripts()->find(name);
-#endif
     return toQObjectList(list);
 }
 
diff --git a/src/lib/preferences/autofillmanager.cpp b/src/lib/preferences/autofillmanager.cpp
index 3f3188e1f..b3c6f08d5 100644
--- a/src/lib/preferences/autofillmanager.cpp
+++ b/src/lib/preferences/autofillmanager.cpp
@@ -92,11 +92,7 @@ void AutoFillManager::loadPasswords()
         item->setText(2, "*****");
 
         QVariant v;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        v.setValue<PasswordEntry>(entry);
-#else
         v.setValue(entry);
-#endif
         item->setData(0, Qt::UserRole + 10, v);
         ui->treePass->addTopLevelItem(item);
     }
@@ -263,11 +259,7 @@ void AutoFillManager::editPass()
 
         if (mApp->autoFill()->updateEntry(entry)) {
             QVariant v;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            v.setValue<PasswordEntry>(entry);
-#else
             v.setValue(entry);
-#endif
             curItem->setData(0, Qt::UserRole + 10, v);
 
             if (m_passwordsShown) {
diff --git a/src/lib/preferences/preferences.cpp b/src/lib/preferences/preferences.cpp
index 3befa2a91..88ad84830 100644
--- a/src/lib/preferences/preferences.cpp
+++ b/src/lib/preferences/preferences.cpp
@@ -57,9 +57,6 @@
 #include <QMessageBox>
 #include <QCloseEvent>
 #include <QColorDialog>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QDesktopWidget>
-#endif
 #include <QWebEngineProfile>
 #include <QWebEngineSettings>
 #include <QLibraryInfo>
@@ -533,11 +530,7 @@ Preferences::Preferences(BrowserWindow* window)
     ui->listWidget->setCurrentRow(currentSettingsPage);
 
     QSize s = size();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const QRect &availableGeometryForScreen = QApplication::desktop()->availableGeometry(this);
-#else
     const QRect &availableGeometryForScreen = screen()->availableGeometry();
-#endif
     if (availableGeometryForScreen.size().width() < s.width()) {
         s.setWidth(availableGeometryForScreen.size().width() - 50);
     }
diff --git a/src/lib/tabwidget/combotabbar.cpp b/src/lib/tabwidget/combotabbar.cpp
index 07aed64e2..eeebe8570 100644
--- a/src/lib/tabwidget/combotabbar.cpp
+++ b/src/lib/tabwidget/combotabbar.cpp
@@ -1359,9 +1359,6 @@ void TabBarHelper::paintEvent(QPaintEvent *)
             grabImage.setDevicePixelRatio(devicePixelRatioF());
             grabImage.fill(Qt::transparent);
             QStylePainter p(&grabImage, this);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            p.initFrom(this);
-#endif
             if (tabDragOffset != 0) {
                 tab.position = QStyleOptionTab::OnlyOneTab;
             }
@@ -1814,11 +1811,7 @@ QSize CloseButton::sizeHint() const
     return QSize(width, height);
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void CloseButton::enterEvent(QEvent* event)
-#else
 void CloseButton::enterEvent(QEnterEvent* event)
-#endif
 {
     if (isEnabled()) {
         update();
diff --git a/src/lib/tabwidget/combotabbar.h b/src/lib/tabwidget/combotabbar.h
index f40f24059..5390d0327 100644
--- a/src/lib/tabwidget/combotabbar.h
+++ b/src/lib/tabwidget/combotabbar.h
@@ -364,11 +364,7 @@ public:
 
     QSize sizeHint() const override;
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void enterEvent(QEvent *event) override;
-#else
     void enterEvent(QEnterEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void paintEvent(QPaintEvent *event) override;
 };
diff --git a/src/lib/tools/buttonwithmenu.cpp b/src/lib/tools/buttonwithmenu.cpp
index 87db07d63..6df3ae16f 100644
--- a/src/lib/tools/buttonwithmenu.cpp
+++ b/src/lib/tools/buttonwithmenu.cpp
@@ -160,11 +160,7 @@ void ButtonWithMenu::generateMenu()
 
     for (const Item &item : qAsConst(m_items)) {
         QVariant variant;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        variant.setValue<Item>(item);
-#else
         variant.setValue(item);
-#endif
         m_menu->addAction(item.icon, item.text, this, SLOT(setCurrentItem()))->setData(variant);
     }
 }
diff --git a/src/lib/tools/desktopfile.cpp b/src/lib/tools/desktopfile.cpp
index 1155274fe..4a1992e7f 100644
--- a/src/lib/tools/desktopfile.cpp
+++ b/src/lib/tools/desktopfile.cpp
@@ -27,9 +27,6 @@ DesktopFile::DesktopFile()
 DesktopFile::DesktopFile(const QString &fileName)
 {
     m_settings.reset(new QSettings(fileName, QSettings::IniFormat));
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    m_settings->setIniCodec("UTF-8");
-#endif
     m_settings->beginGroup(QSL("Desktop Entry"));
 }
 
diff --git a/src/lib/tools/html5permissions/html5permissionsnotification.cpp b/src/lib/tools/html5permissions/html5permissionsnotification.cpp
index 1d56d8830..a527dd16e 100644
--- a/src/lib/tools/html5permissions/html5permissionsnotification.cpp
+++ b/src/lib/tools/html5permissions/html5permissionsnotification.cpp
@@ -101,11 +101,7 @@ void HTML5PermissionsNotification::grantPermissions()
     QTimer::singleShot(0, this, [this]() {
         // We need to have cursor inside view to correctly grab mouse
         if (m_feature == QWebEnginePage::MouseLock) {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            QWidget *view = m_page->view();
-#else
             QWidget *view = QWebEngineView::forPage(m_page);
-#endif
             QCursor::setPos(view->mapToGlobal(view->rect().center()));
         }
 
diff --git a/src/lib/tools/pagethumbnailer.cpp b/src/lib/tools/pagethumbnailer.cpp
index 5cb6fae6f..f3491ed81 100644
--- a/src/lib/tools/pagethumbnailer.cpp
+++ b/src/lib/tools/pagethumbnailer.cpp
@@ -33,11 +33,7 @@ PageThumbnailer::PageThumbnailer(QObject* parent)
     , m_loadTitle(false)
 {
     m_view->setAttribute(Qt::WA_DontShowOnScreen);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    m_view->setSource(QUrl(QSL("qrc:data/thumbnailer-qt5.qml")));
-#else
     m_view->setSource(QUrl(QSL("qrc:data/thumbnailer.qml")));
-#endif
     m_view->rootContext()->setContextProperty(QSL("thumbnailer"), this);
     m_view->show();
 }
diff --git a/src/lib/tools/qztools.cpp b/src/lib/tools/qztools.cpp
index 1f7a19230..f275b8ea1 100644
--- a/src/lib/tools/qztools.cpp
+++ b/src/lib/tools/qztools.cpp
@@ -32,11 +32,7 @@
 #include <QWidget>
 #include <QApplication>
 #include <QSslCertificate>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QDesktopWidget>
-#else
 #include <QScreen>
-#endif
 #include <QUrl>
 #include <QIcon>
 #include <QFileIconProvider>
@@ -49,9 +45,6 @@
 #include <QtGuiVersion>
 
 #ifdef QZ_WS_X11
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QX11Info>
-#endif
 #include <xcb/xcb.h>
 #endif
 
@@ -121,11 +114,7 @@ QByteArray QzTools::readAllFileByteContents(const QString &filename)
 
 void QzTools::centerWidgetOnScreen(QWidget* w)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QRect screen = QApplication::desktop()->screenGeometry(w);
-#else
     QRect screen = w->screen()->geometry();
-#endif
     const QRect size = w->geometry();
     w->move((screen.width() - size.width()) / 2, (screen.height() - size.height()) / 2);
 }
@@ -872,14 +861,10 @@ bool QzTools::startExternalProcess(const QString &executable, const QString &arg
 #ifdef QZ_WS_X11
 static xcb_connection_t *getXcbConnection()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return QX11Info::connection();
-#else
     const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
     if (x11App == nullptr)
         return 0;
     return x11App->connection();
-#endif
 }
 #endif
 
diff --git a/src/lib/webengine/webhittestresult.cpp b/src/lib/webengine/webhittestresult.cpp
index 27c9caa22..9abdf344c 100644
--- a/src/lib/webengine/webhittestresult.cpp
+++ b/src/lib/webengine/webhittestresult.cpp
@@ -18,11 +18,7 @@
 #include "webhittestresult.h"
 #include "webpage.h"
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineContextMenuData>
-#else
 #include <QWebEngineContextMenuRequest>
-#endif
 
 WebHitTestResult::WebHitTestResult(const WebPage *page, const QPoint &pos)
     : m_isNull(true)
@@ -96,13 +92,8 @@ WebHitTestResult::WebHitTestResult(const WebPage *page, const QPoint &pos)
     init(p->url(), p->execJavaScript(js, WebPage::SafeJsWorld).toMap());
 }
 
-void WebHitTestResult::updateWithContextMenuData(const Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS &data)
+void WebHitTestResult::updateWithContextMenuData(const QWebEngineContextMenuRequest &data)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    if (!data.isValid()) {
-        return;
-    }
-#endif
     if (data.position() != m_pos) {
         return;
     }
@@ -113,12 +104,12 @@ void WebHitTestResult::updateWithContextMenuData(const Q_WEB_ENGINE_CONTEXT_MENU
     m_isContentSelected = !data.selectedText().isEmpty();
 
     switch (data.mediaType()) {
-    case Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS::MediaTypeImage:
+    case QWebEngineContextMenuRequest::MediaTypeImage:
         m_imageUrl = data.mediaUrl();
         break;
 
-    case Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS::MediaTypeVideo:
-    case Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS::MediaTypeAudio:
+    case QWebEngineContextMenuRequest::MediaTypeVideo:
+    case QWebEngineContextMenuRequest::MediaTypeAudio:
         m_mediaUrl = data.mediaUrl();
         break;
 
diff --git a/src/lib/webengine/webhittestresult.h b/src/lib/webengine/webhittestresult.h
index 7b939472a..ed6a5b315 100644
--- a/src/lib/webengine/webhittestresult.h
+++ b/src/lib/webengine/webhittestresult.h
@@ -25,13 +25,7 @@
 
 #include "qzcommon.h"
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-class QWebEngineContextMenuData;
-#define Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS QWebEngineContextMenuData
-#else
 class QWebEngineContextMenuRequest;
-#define Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS QWebEngineContextMenuRequest
-#endif
 
 class WebPage;
 
@@ -40,7 +34,7 @@ class FALKON_EXPORT WebHitTestResult
 public:
     explicit WebHitTestResult(const WebPage *page, const QPoint &pos);
 
-    void updateWithContextMenuData(const Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS &data);
+    void updateWithContextMenuData(const QWebEngineContextMenuRequest &data);
 
     QUrl baseUrl() const;
     QString alternateText() const;
diff --git a/src/lib/webengine/webpage.cpp b/src/lib/webengine/webpage.cpp
index d4e553d8a..eebf38771 100644
--- a/src/lib/webengine/webpage.cpp
+++ b/src/lib/webengine/webpage.cpp
@@ -89,9 +89,7 @@ WebPage::WebPage(QObject* parent)
     connect(this, &QWebEnginePage::windowCloseRequested, this, &WebPage::windowCloseRequested);
     connect(this, &QWebEnginePage::fullScreenRequested, this, &WebPage::fullScreenRequested);
     connect(this, &QWebEnginePage::renderProcessTerminated, this, &WebPage::renderProcessTerminated);
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     connect(this, &QWebEnginePage::certificateError, this, &WebPage::onCertificateError);
-#endif
 
     connect(this, &QWebEnginePage::authenticationRequired, this, [this](const QUrl &url, QAuthenticator *auth) {
         mApp->networkManager()->authentication(url, auth, view());
@@ -140,11 +138,7 @@ WebPage::~WebPage()
 
 WebView *WebPage::view() const
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    return static_cast<WebView*>(QWebEnginePage::view());
-#else
     return static_cast<WebView*>(QWebEngineView::forPage(this));
-#endif
 }
 
 bool WebPage::execPrintPage(QPrinter *printer, int timeout)
@@ -153,14 +147,6 @@ bool WebPage::execPrintPage(QPrinter *printer, int timeout)
     bool result = false;
     QTimer::singleShot(timeout, loop.data(), &QEventLoop::quit);
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    print(printer, [loop, &result](bool res) {
-        if (loop && loop->isRunning()) {
-            result = res;
-            loop->quit();
-        }
-    });
-#else
     connect(view(), &QWebEngineView::printFinished, this, [loop, &result](bool res) {
         if (loop && loop->isRunning()) {
             result = res;
@@ -168,7 +154,6 @@ bool WebPage::execPrintPage(QPrinter *printer, int timeout)
         }
     });
     view()->print(printer);
-#endif
 
     loop->exec();
     delete loop;
@@ -454,11 +439,6 @@ bool WebPage::acceptNavigationRequest(const QUrl &url, QWebEnginePage::Navigatio
             QUrlQuery query(url);
             mApp->searchEnginesManager()->addEngine(QUrl(query.queryItemValue(QSL("url"))));
             return false;
-#if QTWEBENGINEWIDGETS_VERSION < QT_VERSION_CHECK(5, 12, 0)
-        } else if (url.path() == QL1S("PrintPage")) {
-            Q_EMIT printRequested();
-            return false;
-#endif
         }
     }
 
@@ -480,12 +460,6 @@ bool WebPage::acceptNavigationRequest(const QUrl &url, QWebEnginePage::Navigatio
     return result;
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-bool WebPage::certificateError(const QWebEngineCertificateError &error)
-{
-    return mApp->networkManager()->certificateError(error, view());
-}
-#else
 void WebPage::onCertificateError(QWebEngineCertificateError error)
 {
     auto mutableError = const_cast<QWebEngineCertificateError&>(error);
@@ -494,7 +468,6 @@ void WebPage::onCertificateError(QWebEngineCertificateError error)
     else
         mutableError.rejectCertificate();
 }
-#endif
 
 QStringList WebPage::chooseFiles(QWebEnginePage::FileSelectionMode mode, const QStringList &oldFiles, const QStringList &acceptedMimeTypes)
 {
diff --git a/src/lib/webengine/webpage.h b/src/lib/webengine/webpage.h
index 425bb3bc2..233029dba 100644
--- a/src/lib/webengine/webpage.h
+++ b/src/lib/webengine/webpage.h
@@ -21,9 +21,7 @@
 #include <QWebEnginePage>
 #include <QWebEngineScript>
 #include <QWebEngineFullScreenRequest>
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 #include <QPrinter>
-#endif
 #include <QVector>
 #include <QElapsedTimer>
 
@@ -96,15 +94,11 @@ private Q_SLOTS:
     void fullScreenRequested(QWebEngineFullScreenRequest fullScreenRequest);
     void featurePermissionRequested(const QUrl &origin, const QWebEnginePage::Feature &feature);
     void renderProcessTerminated(QWebEnginePage::RenderProcessTerminationStatus terminationStatus, int exitCode);
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     void onCertificateError(QWebEngineCertificateError error);
-#endif
 
 private:
     bool acceptNavigationRequest(const QUrl &url, QWebEnginePage::NavigationType type, bool isMainFrame) override;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    bool certificateError(const QWebEngineCertificateError &error) override;
-#endif
+
     QStringList chooseFiles(FileSelectionMode mode, const QStringList &oldFiles, const QStringList &acceptedMimeTypes) override;
     QWebEnginePage* createWindow(QWebEnginePage::WebWindowType type) override;
 
diff --git a/src/lib/webengine/webscrollbarmanager.cpp b/src/lib/webengine/webscrollbarmanager.cpp
index 7a0e3fd7e..ee84f7db6 100644
--- a/src/lib/webengine/webscrollbarmanager.cpp
+++ b/src/lib/webengine/webscrollbarmanager.cpp
@@ -211,14 +211,9 @@ void WebScrollBarManager::createUserScript(int thickness)
 
 void WebScrollBarManager::removeUserScript()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QWebEngineScript script = mApp->webProfile()->scripts()->findScript(QSL("_falkon_scrollbar"));
-    mApp->webProfile()->scripts()->remove(script);
-#else
     for (const QWebEngineScript &script : mApp->webProfile()->scripts()->find(QSL("_falkon_scrollbar"))) {
         mApp->webProfile()->scripts()->remove(script);
     }
-#endif
 }
 
 QSize WebScrollBarManager::viewportSize(WebView *view, int thickness) const
diff --git a/src/lib/webengine/webview.cpp b/src/lib/webengine/webview.cpp
index 54d408292..30fc04edf 100644
--- a/src/lib/webengine/webview.cpp
+++ b/src/lib/webengine/webview.cpp
@@ -44,11 +44,7 @@
 #include <QWebEngineHistory>
 #include <QClipboard>
 #include <QMimeData>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineContextMenuData>
-#else
 #include <QWebEngineContextMenuRequest>
-#endif
 #include <QStackedLayout>
 #include <QScrollBar>
 #include <QPrintDialog>
@@ -150,9 +146,6 @@ void WebView::setPage(WebPage *page)
             Q_EMIT m_page->loadFinished(true);
         }
         mApp->plugins()->emitWebPageDeleted(m_page);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        m_page->setView(nullptr);
-#endif
     }
 
     page->setParent(this);
@@ -409,17 +402,10 @@ void WebView::printPage()
             m_page->printToPdf(dialog->printer()->outputFileName(), dialog->printer()->pageLayout());
             delete dialog;
         } else {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            m_page->print(dialog->printer(), [=](bool success) {
-                Q_UNUSED(success);
-                delete dialog;
-            });
-#else
             connect(this, &QWebEngineView::printFinished, this, [&dialog](bool success) {
                 Q_UNUSED(success);
                 delete dialog;
             });
-#endif
         }
     }
 }
@@ -683,14 +669,11 @@ void WebView::createContextMenu(QMenu *menu, WebHitTestResult &hitTest)
     // cppcheck-suppress variableScope
     int spellCheckActionCount = 0;
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS &contextMenuData = page()->contextMenuData();
-#else
-    const Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS *contextMenuDataPtr = lastContextMenuRequest();
-    if (contextMenuDataPtr == NULL)
+    const QWebEngineContextMenuRequest *contextMenuDataPtr = lastContextMenuRequest();
+    if (contextMenuDataPtr == NULL) {
         return;
-    const Q_WEB_ENGINE_CONTEXT_MENU_DATA_CLASS &contextMenuData = *contextMenuDataPtr;
-#endif
+    }
+    const QWebEngineContextMenuRequest &contextMenuData = *contextMenuDataPtr;
 
     hitTest.updateWithContextMenuData(contextMenuData);
 
@@ -1288,11 +1271,7 @@ bool WebView::eventFilter(QObject *obj, QEvent *event)
     if (obj == this && event->type() == QEvent::ChildAdded) {
         QPointer<QWidget> child = qobject_cast<QWidget*>(static_cast<QChildEvent*>(event)->child());
         QTimer::singleShot(0, this, [=]() {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            if (child && child->inherits("QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget")) {
-#else
             if (child) {
-#endif
                 m_rwhvqt = child;
                 m_rwhvqt->installEventFilter(this);
                 if (auto *w = qobject_cast<QQuickWidget*>(m_rwhvqt)) {
diff --git a/src/lib/webtab/searchtoolbar.cpp b/src/lib/webtab/searchtoolbar.cpp
index 906671558..1f672cf5d 100644
--- a/src/lib/webtab/searchtoolbar.cpp
+++ b/src/lib/webtab/searchtoolbar.cpp
@@ -121,12 +121,8 @@ void SearchToolBar::searchText(const QString &text)
 {
     m_searchRequests++;
     QPointer<SearchToolBar> guard = this;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    m_view->findText(text, m_findFlags, [=](bool found) {
-#else
     m_view->findText(text, m_findFlags, [=](QWebEngineFindTextResult result) {
         bool found = result.numberOfMatches() > 0;
-#endif
         if (!guard) {
             return;
         }
diff --git a/src/plugins/GreaseMonkey/gm_manager.cpp b/src/plugins/GreaseMonkey/gm_manager.cpp
index be1e9c09e..40862a0f4 100644
--- a/src/plugins/GreaseMonkey/gm_manager.cpp
+++ b/src/plugins/GreaseMonkey/gm_manager.cpp
@@ -182,13 +182,9 @@ void GM_Manager::disableScript(GM_Script* script)
     m_disabledScripts.append(script->fullName());
 
     QWebEngineScriptCollection *collection = mApp->webProfile()->scripts();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    collection->remove(collection->findScript(script->fullName()));
-#else
     for (const auto &script : collection->find(script->fullName())) {
         collection->remove(script);
     }
-#endif
 }
 
 bool GM_Manager::addScript(GM_Script* script)
@@ -216,13 +212,9 @@ bool GM_Manager::removeScript(GM_Script* script, bool removeFile)
     m_scripts.removeOne(script);
 
     QWebEngineScriptCollection *collection = mApp->webProfile()->scripts();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    collection->remove(collection->findScript(script->fullName()));
-#else
     for (const auto &script : collection->find(script->fullName())) {
         collection->remove(script);
     }
-#endif
 
     m_disabledScripts.removeOne(script->fullName());
 
@@ -291,13 +283,9 @@ void GM_Manager::scriptChanged()
         return;
 
     QWebEngineScriptCollection *collection = mApp->webProfile()->scripts();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    collection->remove(collection->findScript(script->fullName()));
-#else
     for (const auto &script : collection->find(script->fullName())) {
         collection->remove(script);
     }
-#endif
     collection->insert(script->webScript());
 }
 
diff --git a/src/plugins/KDEFrameworksIntegration/kdeframeworksintegrationplugin.h b/src/plugins/KDEFrameworksIntegration/kdeframeworksintegrationplugin.h
index 36e5a196a..a24fd095b 100644
--- a/src/plugins/KDEFrameworksIntegration/kdeframeworksintegrationplugin.h
+++ b/src/plugins/KDEFrameworksIntegration/kdeframeworksintegrationplugin.h
@@ -19,11 +19,7 @@
 
 #include "plugininterface.h"
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <PurposeWidgets/Menu>
-#else
 #include <Purpose/Menu>
-#endif
 
 class KWalletPasswordBackend;
 class KIOSchemeHandler;
diff --git a/src/plugins/KDEFrameworksIntegration/kioschemehandler.cpp b/src/plugins/KDEFrameworksIntegration/kioschemehandler.cpp
index 0d680e03e..3021e3919 100644
--- a/src/plugins/KDEFrameworksIntegration/kioschemehandler.cpp
+++ b/src/plugins/KDEFrameworksIntegration/kioschemehandler.cpp
@@ -24,13 +24,8 @@
 
 #include <kio_version.h>
 
-#if KIO_VERSION < QT_VERSION_CHECK(5, 240, 0)
-    #include <KIO/AccessManager>
-    Q_GLOBAL_STATIC_WITH_ARGS(KIO::Integration::AccessManager, s_knam, (nullptr))
-#else
-    #include <QNetworkAccessManager>
-    Q_GLOBAL_STATIC_WITH_ARGS(QNetworkAccessManager, s_knam, (nullptr))
-#endif
+#include <QNetworkAccessManager>
+Q_GLOBAL_STATIC_WITH_ARGS(QNetworkAccessManager, s_knam, (nullptr))
 
 KIOSchemeHandler::KIOSchemeHandler(const QString &protocol, QObject *parent)
     : QWebEngineUrlSchemeHandler(parent)
diff --git a/src/plugins/PyFalkon/CMakeLists.txt b/src/plugins/PyFalkon/CMakeLists.txt
index e94bafcfe..dd98ed7e5 100644
--- a/src/plugins/PyFalkon/CMakeLists.txt
+++ b/src/plugins/PyFalkon/CMakeLists.txt
@@ -20,10 +20,8 @@ set(QT_INCLUDE_DIRS
     ${QT_WEBENGINECORE_INCLUDE_DIRS}
     ${QT_WEBENGINEWIDGETS_INCLUDE_DIRS}
 )
-if (QT_MAJOR_VERSION STREQUAL "6")
-    get_property(QT_PRINTSUPPORT_INCLUDE_DIRS TARGET Qt${QT_MAJOR_VERSION}::PrintSupport PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
-    list(APPEND QT_INCLUDE_DIRS ${QT_PRINTSUPPORT_INCLUDE_DIRS})
-endif()
+get_property(QT_PRINTSUPPORT_INCLUDE_DIRS TARGET Qt${QT_MAJOR_VERSION}::PrintSupport PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
+list(APPEND QT_INCLUDE_DIRS ${QT_PRINTSUPPORT_INCLUDE_DIRS})
 set(INCLUDES "")
 foreach(INCLUDE_DIR ${QT_INCLUDE_DIRS})
     list(APPEND INCLUDES "-I${INCLUDE_DIR}")
@@ -37,11 +35,7 @@ endforeach()
 set(GLOBAL_HEADER ${CMAKE_CURRENT_SOURCE_DIR}/pyfalkon_global.h)
 set(TYPESYSTEM_FILE ${CMAKE_CURRENT_SOURCE_DIR}/typesystem_pyfalkon.xml)
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    set(API_VERSION "${Qt6_VERSION_MAJOR}.${Qt6_VERSION_MINOR}")
-else()
-    set(API_VERSION "${Qt5_VERSION_MAJOR}.${Qt5_VERSION_MINOR}")
-endif()
+set(API_VERSION "${Qt6_VERSION_MAJOR}.${Qt6_VERSION_MINOR}")
 
 set(SHIBOKEN_OPTIONS --generator-set=shiboken --enable-parent-ctor-heuristic
     --enable-pyside-extensions --enable-return-value-heuristic --use-isnull-as-nb_nonzero
@@ -144,11 +138,7 @@ set(GENERATED_SOURCES_DEPENDENCIES
     ${TYPESYSTEM_FILE}
 )
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    set(PYSIDE_VERSION "6")
-else()
-    set(PYSIDE_VERSION "2")
-endif()
+set(PYSIDE_VERSION "6")
 
 # Add custom target to run shiboken.
 add_custom_command(OUTPUT ${GENERATED_SOURCES}
diff --git a/src/plugins/PyFalkon/pyfalkon_global.h b/src/plugins/PyFalkon/pyfalkon_global.h
index 1b139a3bc..861e16d8a 100644
--- a/src/plugins/PyFalkon/pyfalkon_global.h
+++ b/src/plugins/PyFalkon/pyfalkon_global.h
@@ -21,11 +21,7 @@
 
 // PYSIDE-711
 #include <QHstsPolicy>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QWebEngineContextMenuData>
-#else
 #include <QWebEngineContextMenuRequest>
-#endif
 
 // 3rdparty
 #include "lineedit.h"
diff --git a/src/plugins/PyFalkon/typesystem_pyfalkon.xml b/src/plugins/PyFalkon/typesystem_pyfalkon.xml
index 8ca3e3284..95bc60956 100644
--- a/src/plugins/PyFalkon/typesystem_pyfalkon.xml
+++ b/src/plugins/PyFalkon/typesystem_pyfalkon.xml
@@ -267,12 +267,8 @@
     %RETURN_TYPE retval_ = %CPPSELF.%FUNCTION_NAME(%1, %2, %3, %4, %5, &amp;%6, %7);
     %PYARG_0 = PyTuple_New(2);
     PyTuple_SET_ITEM(%PYARG_0, 0, %CONVERTTOPYTHON[%RETURN_TYPE](retval_));
-#if (QT_VERSION &lt; QT_VERSION_CHECK(6, 0, 0))
-    PyTuple_SET_ITEM(%PYARG_0, 1, %CONVERTTOPYTHON[%ARG6_TYPE](%6));
-#else
     auto ARG6_PTR = &amp;%6;
     PyTuple_SET_ITEM(%PYARG_0, 1, %CONVERTTOPYTHON[%ARG6_TYPE](ARG6_PTR));
-#endif
     </template>
 
     <suppress-warning text="Unable to translate type &quot;std::function&lt;QPoint (QSize)&gt;&quot;:*"/>
diff --git a/src/plugins/StatusBarIcons/sbi_networkicon.cpp b/src/plugins/StatusBarIcons/sbi_networkicon.cpp
index 7d9156154..b2aaa9640 100644
--- a/src/plugins/StatusBarIcons/sbi_networkicon.cpp
+++ b/src/plugins/StatusBarIcons/sbi_networkicon.cpp
@@ -23,26 +23,15 @@
 #include "browserwindow.h"
 
 #include <QMenu>
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QNetworkConfigurationManager>
-#endif
 
 SBI_NetworkIcon::SBI_NetworkIcon(BrowserWindow* window)
     : SBI_Icon(window)
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    , m_networkConfiguration(new QNetworkConfigurationManager(this))
-#endif
 {
     setObjectName(QSL("sbi_networkicon"));
     setCursor(Qt::PointingHandCursor);
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    onlineStateChanged(m_networkConfiguration->isOnline());
-
-    connect(m_networkConfiguration, &QNetworkConfigurationManager::onlineStateChanged, this, &SBI_NetworkIcon::onlineStateChanged);
-#else
+    /* TODO rework connection detection */
     onlineStateChanged(true);
-#endif
     connect(this, &ClickableLabel::clicked, this, &SBI_NetworkIcon::showMenu);
 }
 
@@ -105,18 +94,9 @@ void SBI_NetworkIcon::updateToolTip()
 {
     QString tooltip = tr("Shows network status and manages proxy<br/><br/><b>Network:</b><br/>%1<br/><br/><b>Proxy:</b><br/>%2");
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    if (m_networkConfiguration->isOnline()) {
-        tooltip = tooltip.arg(tr("Connected"));
-    }
-    else {
-        tooltip = tooltip.arg(tr("Offline"));
-    }
-#else
     // TODO QT6 - in Qt6 we're always reporting as online, should we just remove this functionality instead?
     // Or is there a way to detect network status in Qt6?
     tooltip = tooltip.arg(tr("Connected"));
-#endif
 
     switch (QNetworkProxy::applicationProxy().type()) {
     case QNetworkProxy::DefaultProxy:
@@ -139,11 +119,7 @@ void SBI_NetworkIcon::updateToolTip()
     setToolTip(tooltip);
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-void SBI_NetworkIcon::enterEvent(QEvent* event)
-#else
 void SBI_NetworkIcon::enterEvent(QEnterEvent* event)
-#endif
 {
     updateToolTip();
 
diff --git a/src/plugins/StatusBarIcons/sbi_networkicon.h b/src/plugins/StatusBarIcons/sbi_networkicon.h
index 5567a6d42..1a60d4e8b 100644
--- a/src/plugins/StatusBarIcons/sbi_networkicon.h
+++ b/src/plugins/StatusBarIcons/sbi_networkicon.h
@@ -40,16 +40,7 @@ private Q_SLOTS:
 
 private:
     void updateToolTip();
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    void enterEvent(QEvent* event) override;
-#else
     void enterEvent(QEnterEvent* event) override;
-#endif
-
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    // TODO QT6 - should we try to replace the online status detection using Qt 6?
-    QNetworkConfigurationManager* m_networkConfiguration;
-#endif
 };
 
 #endif // SBI_NETWORKICON_H
diff --git a/src/plugins/TabManager/tabmanagerdelegate.cpp b/src/plugins/TabManager/tabmanagerdelegate.cpp
index 02a2e9411..045db6ade 100644
--- a/src/plugins/TabManager/tabmanagerdelegate.cpp
+++ b/src/plugins/TabManager/tabmanagerdelegate.cpp
@@ -244,11 +244,7 @@ void TabManagerDelegate::viewItemDrawText(QPainter *p, const QStyleOptionViewIte
                 highlightParts << highlightedPart;
             }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-            textLayout.setAdditionalFormats(highlightParts);
-#else
             textLayout.setFormats(highlightParts);
-#endif
         }
     }
 
diff --git a/src/plugins/TabManager/tabmanagerwidget.cpp b/src/plugins/TabManager/tabmanagerwidget.cpp
index efea3e479..ada35ccb9 100644
--- a/src/plugins/TabManager/tabmanagerwidget.cpp
+++ b/src/plugins/TabManager/tabmanagerwidget.cpp
@@ -34,19 +34,13 @@
 #include "tabcontextmenu.h"
 #include "tabbar.h"
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QDesktopWidget>
-#endif
 #include <QDialogButtonBox>
 #include <QStackedWidget>
 #include <QDialog>
 #include <QTimer>
 #include <QLabel>
 #include <QMimeData>
-
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 #include <QRegExp>
-#endif
 
 
 TLDExtractor* TabManagerWidget::s_tldExtractor = 0;
@@ -128,11 +122,7 @@ QString TabManagerWidget::domainFromUrl(const QUrl &url, bool useHostName)
         return urlString.append(appendString);
     }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    if (useHostName || host.contains(QRegExp(R"(^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$)"))) {
-#else
     if (useHostName || QRegExp(R"(^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$)").indexIn(host) >= 0) {
-#endif
         if (host.startsWith("www.", Qt::CaseInsensitive)) {
             host.remove(0, 4);
         }
@@ -571,11 +561,7 @@ void TabManagerWidget::detachSelectedTabs(const QMultiHash<BrowserWindow*, WebTa
     }
 
     BrowserWindow* newWindow = mApp->createWindow(Qz::BW_OtherRestoredWindow);
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const QRect &availableGeometryForScreen = mApp->desktop()->availableGeometry(this);
-#else
     const QRect &availableGeometryForScreen = screen()->availableGeometry();
-#endif
     newWindow->move(availableGeometryForScreen.topLeft() + QPoint(30, 30));
 
     detachTabsTo(newWindow, tabsHash);
@@ -895,11 +881,7 @@ QStringList TabTreeWidget::mimeTypes() const
     return types;
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-QMimeData *TabTreeWidget::mimeData(const QList<QTreeWidgetItem*> items) const
-#else
 QMimeData *TabTreeWidget::mimeData(const QList<QTreeWidgetItem*> &items) const
-#endif
 {
     auto* mimeData = new QMimeData();
     QByteArray encodedData;
diff --git a/src/plugins/TabManager/tabmanagerwidget.h b/src/plugins/TabManager/tabmanagerwidget.h
index cb6ddc6f9..a2f41d1c6 100644
--- a/src/plugins/TabManager/tabmanagerwidget.h
+++ b/src/plugins/TabManager/tabmanagerwidget.h
@@ -44,11 +44,7 @@ public:
 
     Qt::DropActions supportedDropActions() const override;
     QStringList mimeTypes() const override;
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    QMimeData* mimeData(const QList<QTreeWidgetItem*> items) const override;
-#else
     QMimeData* mimeData(const QList<QTreeWidgetItem*> &items) const override;
-#endif
     bool dropMimeData(QTreeWidgetItem *parent, int index, const QMimeData *data, Qt::DropAction action) override;
 
     void setEnableDragTabs(bool enable);
diff --git a/src/plugins/TabManager/tabmanagerwidgetcontroller.cpp b/src/plugins/TabManager/tabmanagerwidgetcontroller.cpp
index e0d214013..7ef1e2723 100644
--- a/src/plugins/TabManager/tabmanagerwidgetcontroller.cpp
+++ b/src/plugins/TabManager/tabmanagerwidgetcontroller.cpp
@@ -25,11 +25,7 @@
 #include "statusbar.h"
 #include "navigationbar.h"
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-#include <QDesktopWidget>
-#else
 #include <QScreen>
-#endif
 #include <QAction>
 #include <QStyle>
 
@@ -217,11 +213,7 @@ void TabManagerWidgetController::showSideBySide()
         return;
     }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    const QRect &availableGeometry = mApp->desktop()->availableGeometry(defaultTabManager());
-#else
     const QRect &availableGeometry = defaultTabManager()->screen()->availableGeometry();
-#endif
     static int frameWidth = (defaultTabManager()->frameGeometry().width() - defaultTabManager()->geometry().width()) / 2;
     static int titleBarHeight = defaultTabManager()->style()->pixelMetric(QStyle::PM_TitleBarHeight);
 
diff --git a/src/plugins/TabManager/tldextractor/tldextractor.cpp b/src/plugins/TabManager/tldextractor/tldextractor.cpp
index 6b449eb57..7a78b99fd 100644
--- a/src/plugins/TabManager/tldextractor/tldextractor.cpp
+++ b/src/plugins/TabManager/tldextractor/tldextractor.cpp
@@ -22,10 +22,7 @@
 #include <QFileInfo>
 #include <QMessageBox>
 #include <QUrl>
-
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 #include <QRegExp>
-#endif
 
 TLDExtractor* TLDExtractor::s_instance = 0;
 
@@ -388,11 +385,7 @@ bool TLDExtractor::test()
             continue;
         }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-        line.indexOf(testRegExp);
-#else
         testRegExp.indexIn(line);
-#endif
 
         const QString hostName = testRegExp.cap(2);
         const QString registrableName = testRegExp.cap(4);
diff --git a/src/plugins/VerticalTabs/tablistview.cpp b/src/plugins/VerticalTabs/tablistview.cpp
index db6e570f3..246f7aaeb 100644
--- a/src/plugins/VerticalTabs/tablistview.cpp
+++ b/src/plugins/VerticalTabs/tablistview.cpp
@@ -240,11 +240,7 @@ void TabListView::updateVisibility()
 
 void TabListView::updateHeight()
 {
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    setFixedHeight(m_delegate->sizeHint(viewOptions(), QModelIndex()).height());
-#else
     QStyleOptionViewItem option;
     initViewItemOption(&option);
     setFixedHeight(m_delegate->sizeHint(option, QModelIndex()).height());
-#endif
 }