diff --git a/Makefile b/Makefile
index f3b8322..3ce0ffc 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,8 @@ else
 endif
 endif
 
+#OPTIONS = "DEFINES += NO_KDE_INTEGRATION"
+
 .PHONY:	clean \
 	systray-x-xpi \
 	systray-x-app
@@ -56,7 +58,7 @@ systray-x-app:
 	rm -f SysTray-X ;\
 	mkdir -p app/build ;\
 	cd app/build ;\
-	$(QMAKE) $(EXT_VERSION) ../SysTray-X/SysTray-X.pro ;\
+	$(QMAKE) $(EXT_VERSION) $(OPTIONS) ../SysTray-X/SysTray-X.pro ;\
 	make ;\
 	cd ../.. ;\
 	cp app/build/SysTray-X .
diff --git a/README.md b/README.md
index 8d26e5d..970293c 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ sudo apt update
 ###### 16.04 LTS
 
 ```bash
-wget -q https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04/Release.key
+wget -q http://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04/Release.key
 sudo apt-key add Release.key
 sudo bash -c 'echo "deb https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons/xUbuntu_16.04 ./" > /etc/apt/sources.list.d/systray-x.list'
 sudo apt update
@@ -273,12 +273,18 @@ Requirements:
     gnome-shell-extension-tool -e ubuntu-appindicator@ubuntu.com
     ```
 
-Build:
+Build (KDE):
 ```bash
 cd systray-x
 make
 ```
 
+Build (GNOME):
+```bash
+cd systray-x
+make OPTIONS="DEFINES+=NO_KDE_INTEGRATION"
+```
+
 Install and run SysTray-X from the build directory in the repository:
 ```bash
 mkdir -p ~/.mozilla/native-messaging-hosts
diff --git a/README.references.txt b/README.references.txt
index 8b6215b..ea57dfd 100644
--- a/README.references.txt
+++ b/README.references.txt
@@ -1,5 +1,14 @@
 #<script>
 
+Notifier
+
+https://stackoverflow.com/questions/52935526/kstatusnotifieritem-instantiation-crashes-qt
+
+
+kstatusnotifieritem.h => knotifications-devel
+
+
+
 
 Installers
 
diff --git a/app/SysTray-X/SysTray-X.pro b/app/SysTray-X/SysTray-X.pro
index 242a2d8..73a4063 100644
--- a/app/SysTray-X/SysTray-X.pro
+++ b/app/SysTray-X/SysTray-X.pro
@@ -4,10 +4,28 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+#DEFINES += NO_KDE_INTEGRATION
+
+
+!contains(DEFINES,NO_KDE_INTEGRATION) {
+    DEFINES += KDE_INTEGRATION
+}
+
+#
+# Set the Qt modules
+#
+QT += core gui
+unix:!macx: {
+    contains(DEFINES,KDE_INTEGRATION) {
+        QT += dbus KNotifications
+    }
+}
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
+#
+# Define the target
+#
 TARGET = SysTray-X
 TEMPLATE = app
 
@@ -158,6 +176,10 @@ SOURCES += \
 unix: {
 SOURCES += \
         windowctrl-unix.cpp
+    contains(DEFINES,KDE_INTEGRATION) {
+        SOURCES += \
+            systrayxstatusnotifier.cpp
+    }
 }
 win32: {
 SOURCES += \
@@ -175,6 +197,11 @@ HEADERS += \
 unix: {
 HEADERS += \
         windowctrl-unix.h
+
+    contains(DEFINES,KDE_INTEGRATION) {
+        HEADERS += \
+            systrayxstatusnotifier.h
+    }
 }
 win32: {
 HEADERS += \
diff --git a/app/SysTray-X/SysTray-X.qrc b/app/SysTray-X/SysTray-X.qrc
index 0be4112..31354b2 100644
--- a/app/SysTray-X/SysTray-X.qrc
+++ b/app/SysTray-X/SysTray-X.qrc
@@ -11,5 +11,6 @@
         <file>files/icons/window-restore.png</file>
         <file>files/icons/mail-unread.png</file>
         <file>files/icons/help-about.png</file>
+        <file>files/icons/dialog-warning.png</file>
     </qresource>
 </RCC>
diff --git a/app/SysTray-X/files/icons/dialog-warning.png b/app/SysTray-X/files/icons/dialog-warning.png
new file mode 100644
index 0000000..76adf78
Binary files /dev/null and b/app/SysTray-X/files/icons/dialog-warning.png differ
diff --git a/app/SysTray-X/preferences.cpp b/app/SysTray-X/preferences.cpp
index 83e0b2c..738073e 100644
--- a/app/SysTray-X/preferences.cpp
+++ b/app/SysTray-X/preferences.cpp
@@ -37,6 +37,7 @@ Preferences::Preferences( QObject *parent ) : QObject( parent )
     m_default_icon_type = PREF_DEFAULT_ICON_DEFAULT;
     m_default_icon_mime = "image/png";
     m_default_icon_data = QByteArray();
+    m_hide_default_icon = false;
 
     m_icon_type = PREF_BLANK_ICON;
     m_icon_mime = "image/png";
@@ -218,6 +219,32 @@ void    Preferences::setDefaultIconData( const QByteArray& icon_data )
 }
 
 
+/*
+ *  Get the hide default icon state.
+ */
+bool    Preferences::getHideDefaultIcon() const
+{
+    return m_hide_default_icon;
+}
+
+
+/*
+ *  Set the hide default icon state.
+ */
+void    Preferences::setHideDefaultIcon( bool hide )
+{
+    if( m_hide_default_icon != hide)
+    {
+        m_hide_default_icon = hide;
+
+        /*
+         *  Tell the world the new preference
+         */
+        emit signalHideDefaultIconChange();
+    }
+}
+
+
 /*
  *  Get the icon type.
  */
diff --git a/app/SysTray-X/preferences.h b/app/SysTray-X/preferences.h
index 3a01305..845a439 100644
--- a/app/SysTray-X/preferences.h
+++ b/app/SysTray-X/preferences.h
@@ -184,6 +184,20 @@ class Preferences : public QObject
          */
         void setDefaultIconData( const QByteArray& icon_data );
 
+        /**
+         * @brief getHideDefaultIcon. Get the hide default icon state.
+         *
+         * @return      The state.
+         */
+        bool    getHideDefaultIcon() const;
+
+        /**
+         * @brief setHideDefaultIcon. Set the hide default icon state.
+         *
+         * @param      The state.
+         */
+        void setHideDefaultIcon( bool hide );
+
         /**
          * @brief getIconType. Get the icon type.
          *
@@ -385,6 +399,11 @@ class Preferences : public QObject
          */
         void signalDefaultIconDataChange();
 
+        /**
+         * @brief signalHideDefaultIconChange. Signal a hide default icon change.
+         */
+        void signalHideDefaultIconChange();
+
         /**
          * @brief signalIconTypeChange. Signal a icon type change.
          */
@@ -472,6 +491,11 @@ class Preferences : public QObject
          */
         QByteArray m_default_icon_data;
 
+        /**
+         * @brief m_hide_default_icon. Hide default icon state.
+         */
+        bool    m_hide_default_icon;
+
         /**
          * @brief m_icon_type. Selected icon type.
          */
diff --git a/app/SysTray-X/preferences.ui b/app/SysTray-X/preferences.ui
index b92f9f3..87af2ef 100644
--- a/app/SysTray-X/preferences.ui
+++ b/app/SysTray-X/preferences.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>525</width>
+    <width>543</width>
     <height>600</height>
    </rect>
   </property>
@@ -17,160 +17,96 @@
    <iconset resource="SysTray-X.qrc">
     <normaloff>:/files/icons/SysTray-X.png</normaloff>:/files/icons/SysTray-X.png</iconset>
   </property>
-  <layout class="QGridLayout" name="gridLayout_3">
+  <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
-    <layout class="QGridLayout" name="gridLayout">
-     <item row="0" column="0">
+    <layout class="QVBoxLayout" name="verticalLayout_15">
+     <item>
       <widget class="QGroupBox" name="groupBox_2">
        <property name="title">
         <string>Default icon</string>
        </property>
-       <layout class="QVBoxLayout" name="verticalLayout_12">
+       <layout class="QVBoxLayout" name="verticalLayout_13">
         <item>
-         <layout class="QVBoxLayout" name="verticalLayout_9">
-          <item>
-           <widget class="QRadioButton" name="defaultIconRadioButton">
-            <property name="text">
-             <string>Default Thunderbird</string>
-            </property>
-            <property name="checked">
-             <bool>true</bool>
-            </property>
-            <attribute name="buttonGroup">
-             <string notr="true">defaultIconTypeGroup</string>
-            </attribute>
-           </widget>
-          </item>
-          <item>
-           <widget class="QRadioButton" name="hideDefaultIconRadioButton">
-            <property name="text">
-             <string>Hide icon</string>
-            </property>
-            <attribute name="buttonGroup">
-             <string notr="true">defaultIconTypeGroup</string>
-            </attribute>
-           </widget>
-          </item>
-          <item>
-           <layout class="QHBoxLayout" name="horizontalLayout_4">
-            <item>
-             <widget class="QRadioButton" name="customDefaultIconRadioButton">
-              <property name="text">
-               <string>Custom icon</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">defaultIconTypeGroup</string>
-              </attribute>
-             </widget>
-            </item>
-            <item>
-             <widget class="QLabel" name="defaultImageLabel">
-              <property name="text">
-               <string/>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QPushButton" name="chooseCustomDefaultIconButton">
-              <property name="text">
-               <string>Choose</string>
-              </property>
-              <property name="flat">
-               <bool>false</bool>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </item>
-         </layout>
-        </item>
-       </layout>
-      </widget>
-     </item>
-     <item row="0" column="1" rowspan="2">
-      <widget class="QGroupBox" name="groupBox">
-       <property name="title">
-        <string>Windows</string>
-       </property>
-       <layout class="QVBoxLayout" name="verticalLayout_11">
-        <item>
-         <layout class="QVBoxLayout" name="verticalLayout_10">
-          <item>
-           <widget class="QGroupBox" name="groupBox_4">
-            <property name="title">
-             <string>Minimize</string>
-            </property>
-            <layout class="QGridLayout" name="gridLayout_2">
-             <item row="0" column="0">
-              <layout class="QVBoxLayout" name="verticalLayout_3">
+         <widget class="QGroupBox" name="groupBox_5">
+          <property name="title">
+           <string>Icon</string>
+          </property>
+          <layout class="QVBoxLayout" name="verticalLayout_12">
+           <item>
+            <layout class="QVBoxLayout" name="verticalLayout_9">
+             <item>
+              <widget class="QRadioButton" name="defaultIconRadioButton">
+               <property name="text">
+                <string>Default Thunderbird</string>
+               </property>
+               <property name="checked">
+                <bool>true</bool>
+               </property>
+               <attribute name="buttonGroup">
+                <string notr="true">defaultIconTypeGroup</string>
+               </attribute>
+              </widget>
+             </item>
+             <item>
+              <widget class="QRadioButton" name="lookThroughDefaultIconRadioButton">
+               <property name="text">
+                <string>Lookthrough icon</string>
+               </property>
+               <attribute name="buttonGroup">
+                <string notr="true">defaultIconTypeGroup</string>
+               </attribute>
+              </widget>
+             </item>
+             <item>
+              <layout class="QHBoxLayout" name="horizontalLayout_4">
                <item>
-                <widget class="QRadioButton" name="defaultMinimizeRadioButton">
+                <widget class="QRadioButton" name="customDefaultIconRadioButton">
                  <property name="text">
-                  <string>Default minimize</string>
+                  <string>Custom icon</string>
                  </property>
-                 <property name="checked">
+                 <attribute name="buttonGroup">
+                  <string notr="true">defaultIconTypeGroup</string>
+                 </attribute>
+                </widget>
+               </item>
+               <item>
+                <widget class="QLabel" name="defaultImageLabel">
+                 <property name="text">
+                  <string/>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QPushButton" name="chooseCustomDefaultIconButton">
+                 <property name="text">
+                  <string>Choose</string>
+                 </property>
+                 <property name="flat">
                   <bool>false</bool>
                  </property>
-                 <attribute name="buttonGroup">
-                  <string notr="true">minimizeTypeGroup</string>
-                 </attribute>
-                </widget>
-               </item>
-               <item>
-                <widget class="QRadioButton" name="minimizeMethod1RadioButton">
-                 <property name="text">
-                  <string>Minimize to tray, method 1</string>
-                 </property>
-                 <property name="checked">
-                  <bool>true</bool>
-                 </property>
-                 <attribute name="buttonGroup">
-                  <string notr="true">minimizeTypeGroup</string>
-                 </attribute>
-                </widget>
-               </item>
-               <item>
-                <widget class="QRadioButton" name="minimizeMethod2RadioButton">
-                 <property name="text">
-                  <string>Minimize to tray, method 2</string>
-                 </property>
-                 <attribute name="buttonGroup">
-                  <string notr="true">minimizeTypeGroup</string>
-                 </attribute>
                 </widget>
                </item>
               </layout>
              </item>
             </layout>
-           </widget>
-          </item>
-          <item>
-           <layout class="QVBoxLayout" name="verticalLayout_4">
-            <item>
-             <widget class="QCheckBox" name="startMinimizedCheckBox">
-              <property name="text">
-               <string>Start application minimized</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QCheckBox" name="minimizeOnCloseCheckBox">
-              <property name="text">
-               <string>Minimize on close</string>
-              </property>
-              <property name="checked">
-               <bool>true</bool>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </item>
-         </layout>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="hideDefaultIconCheckBox">
+          <property name="text">
+           <string>KDE integration (Hide)</string>
+          </property>
+          <property name="checked">
+           <bool>false</bool>
+          </property>
+         </widget>
         </item>
        </layout>
       </widget>
      </item>
-     <item row="1" column="0" rowspan="2">
+     <item>
       <widget class="QGroupBox" name="iconTypeGroupBox">
        <property name="title">
         <string>Mail notification icon</string>
@@ -307,7 +243,107 @@
        </layout>
       </widget>
      </item>
-     <item row="2" column="1" rowspan="2">
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>113</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item row="0" column="1">
+    <layout class="QVBoxLayout" name="verticalLayout_14">
+     <item>
+      <widget class="QGroupBox" name="groupBox">
+       <property name="title">
+        <string>Windows</string>
+       </property>
+       <layout class="QVBoxLayout" name="verticalLayout_11">
+        <item>
+         <layout class="QVBoxLayout" name="verticalLayout_10">
+          <item>
+           <widget class="QGroupBox" name="groupBox_4">
+            <property name="title">
+             <string>Minimize</string>
+            </property>
+            <layout class="QGridLayout" name="gridLayout_2">
+             <item row="0" column="0">
+              <layout class="QVBoxLayout" name="verticalLayout_3">
+               <item>
+                <widget class="QRadioButton" name="defaultMinimizeRadioButton">
+                 <property name="text">
+                  <string>Default minimize</string>
+                 </property>
+                 <property name="checked">
+                  <bool>false</bool>
+                 </property>
+                 <attribute name="buttonGroup">
+                  <string notr="true">minimizeTypeGroup</string>
+                 </attribute>
+                </widget>
+               </item>
+               <item>
+                <widget class="QRadioButton" name="minimizeMethod1RadioButton">
+                 <property name="text">
+                  <string>Minimize to tray, method 1</string>
+                 </property>
+                 <property name="checked">
+                  <bool>true</bool>
+                 </property>
+                 <attribute name="buttonGroup">
+                  <string notr="true">minimizeTypeGroup</string>
+                 </attribute>
+                </widget>
+               </item>
+               <item>
+                <widget class="QRadioButton" name="minimizeMethod2RadioButton">
+                 <property name="text">
+                  <string>Minimize to tray, method 2</string>
+                 </property>
+                 <attribute name="buttonGroup">
+                  <string notr="true">minimizeTypeGroup</string>
+                 </attribute>
+                </widget>
+               </item>
+              </layout>
+             </item>
+            </layout>
+           </widget>
+          </item>
+          <item>
+           <layout class="QVBoxLayout" name="verticalLayout_4">
+            <item>
+             <widget class="QCheckBox" name="startMinimizedCheckBox">
+              <property name="text">
+               <string>Start application minimized</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QCheckBox" name="minimizeOnCloseCheckBox">
+              <property name="text">
+               <string>Minimize on close</string>
+              </property>
+              <property name="checked">
+               <bool>true</bool>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
       <widget class="QGroupBox" name="groupBox_3">
        <property name="title">
         <string>Number properties</string>
@@ -411,20 +447,7 @@
        </layout>
       </widget>
      </item>
-     <item row="3" column="0">
-      <spacer name="verticalSpacer">
-       <property name="orientation">
-        <enum>Qt::Vertical</enum>
-       </property>
-       <property name="sizeHint" stdset="0">
-        <size>
-         <width>20</width>
-         <height>113</height>
-        </size>
-       </property>
-      </spacer>
-     </item>
-     <item row="4" column="1">
+     <item>
       <spacer name="verticalSpacer_2">
        <property name="orientation">
         <enum>Qt::Vertical</enum>
@@ -439,7 +462,7 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="0">
+   <item row="1" column="0" colspan="2">
     <layout class="QHBoxLayout" name="horizontalLayout_7">
      <item>
       <widget class="QCheckBox" name="debugWindowCheckBox">
@@ -484,9 +507,9 @@
   </connection>
  </connections>
  <buttongroups>
-  <buttongroup name="countTypeGroup"/>
-  <buttongroup name="minimizeTypeGroup"/>
   <buttongroup name="defaultIconTypeGroup"/>
+  <buttongroup name="minimizeTypeGroup"/>
   <buttongroup name="iconTypeGroup"/>
+  <buttongroup name="countTypeGroup"/>
  </buttongroups>
 </ui>
diff --git a/app/SysTray-X/preferencesdialog.cpp b/app/SysTray-X/preferencesdialog.cpp
index 4c48b39..f5ba68c 100644
--- a/app/SysTray-X/preferencesdialog.cpp
+++ b/app/SysTray-X/preferencesdialog.cpp
@@ -42,6 +42,14 @@ PreferencesDialog::PreferencesDialog( SysTrayXLink *link, Preferences *pref, QWi
     m_ui->minimizeMethod1RadioButton->setText( "Minimize to tray" );
     m_ui->minimizeMethod2RadioButton->hide();
 
+    m_ui->hideDefaultIconCheckBox->hide();
+
+#endif
+
+#if defined( Q_OS_UNIX ) && defined( NO_KDE_INTEGRATION )
+
+    m_ui->hideDefaultIconCheckBox->hide();
+
 #endif
 
     /*
@@ -75,7 +83,7 @@ PreferencesDialog::PreferencesDialog( SysTrayXLink *link, Preferences *pref, QWi
      *  Set default icon type button Ids
      */
     m_ui->defaultIconTypeGroup->setId( m_ui->defaultIconRadioButton, Preferences::PREF_DEFAULT_ICON_DEFAULT );
-    m_ui->defaultIconTypeGroup->setId( m_ui->hideDefaultIconRadioButton, Preferences::PREF_DEFAULT_ICON_HIDE );
+    m_ui->defaultIconTypeGroup->setId( m_ui->lookThroughDefaultIconRadioButton, Preferences::PREF_DEFAULT_ICON_HIDE );
     m_ui->defaultIconTypeGroup->setId( m_ui->customDefaultIconRadioButton, Preferences::PREF_DEFAULT_ICON_CUSTOM );
 
     /*
@@ -230,6 +238,16 @@ void    PreferencesDialog::setDefaultIcon()
     m_ui->defaultImageLabel->setPixmap( pixmap.scaledToHeight( m_ui->chooseCustomButton->size().height() ) );
 }
 
+
+/*
+ *  Set the hide default icon
+ */
+void    PreferencesDialog::setHideDefaultIcon( bool hide )
+{
+    m_ui->hideDefaultIconCheckBox->setChecked( hide );
+}
+
+
 /*
  *  Set the enable number state
  */
@@ -287,6 +305,7 @@ void    PreferencesDialog::slotAccept()
     m_pref->setDefaultIconType( static_cast< Preferences::DefaultIconType >( m_ui->defaultIconTypeGroup->checkedId() ) );
     m_pref->setDefaultIconMime( m_tmp_default_icon_mime );
     m_pref->setDefaultIconData( m_tmp_default_icon_data );
+    m_pref->setHideDefaultIcon( m_ui->hideDefaultIconCheckBox->isChecked() );
 
     m_pref->setIconType( static_cast< Preferences::IconType >( m_ui->iconTypeGroup->checkedId() ) );
     m_pref->setIconMime( m_tmp_icon_mime );
@@ -477,6 +496,15 @@ void    PreferencesDialog::slotDefaultIconDataChange()
 }
 
 
+/*
+ *  Handle the hide default icon change signal
+ */
+void    PreferencesDialog::slotHideDefaultIconChange()
+{
+    setHideDefaultIcon( m_pref->getHideDefaultIcon() );
+}
+
+
 /*
  *  Handle the enable number state change
  */
diff --git a/app/SysTray-X/preferencesdialog.h b/app/SysTray-X/preferencesdialog.h
index 4139789..28857d9 100644
--- a/app/SysTray-X/preferencesdialog.h
+++ b/app/SysTray-X/preferencesdialog.h
@@ -109,6 +109,13 @@ class PreferencesDialog : public QDialog
          */
         void    setDefaultIcon();
 
+        /**
+         * @brief setHideDefaultIcon. Set the hide default icon.
+         *
+         *  @param hide     The state.
+         */
+        void    setHideDefaultIcon( bool hide );
+
         /**
          * @brief setShowNumber. Set the show number state.
          *
@@ -183,6 +190,11 @@ class PreferencesDialog : public QDialog
          */
         void    slotDefaultIconTypeChange();
 
+        /**
+         * @brief slotHideDefaultIconChange. Slot for handling hide default icon change signals.
+         */
+        void    slotHideDefaultIconChange();
+
         /**
          * @brief slotIconDataChange. Slot for handling icon data change signals.
          */
diff --git a/app/SysTray-X/systrayx.cpp b/app/SysTray-X/systrayx.cpp
index 3af26c4..017f6ad 100644
--- a/app/SysTray-X/systrayx.cpp
+++ b/app/SysTray-X/systrayx.cpp
@@ -7,6 +7,7 @@
 #include "preferencesdialog.h"
 #include "systrayxlink.h"
 #include "systrayxicon.h"
+#include "systrayxstatusnotifier.h"
 #include "windowctrl.h"
 
 /*
@@ -14,8 +15,8 @@
  */
 #include <QCoreApplication>
 #include <QMenu>
-#include <QStyle>
 #include <QIcon>
+#include <QTimer>
 
 /*
  *  Constants
@@ -32,6 +33,11 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
      *  Initialize
      */
     m_tray_icon = nullptr;
+    m_kde_tray_icon = nullptr;
+
+    m_tray_icon_menu = nullptr;
+
+    m_unread_mail = 0;
 
     /*
      *  Setup preferences storage
@@ -65,12 +71,6 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
      */
     m_pref_dialog = new PreferencesDialog( m_link, m_preferences );
 
-    /*
-     *  Setup tray icon
-     */
-    createMenu();
-    showTrayIcon();
-
     /*
      *  Setup debug window
      */
@@ -83,9 +83,6 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
      *  Connect debug link signals
      */
     connect( m_link, &SysTrayXLink::signalUnreadMail, m_debug, &DebugWidget::slotUnreadMail );
-//    connect( m_link, &SysTrayXLink::signalUnreadMail, this, &SysTrayX::slotUnreadMail );
-//    connect( m_win_ctrl, &WindowCtrl::signalShow, this, &SysTrayX::slotShow );
-//    connect( m_win_ctrl, &WindowCtrl::signalHide, this, &SysTrayX::slotHide );
 
     connect( this, &SysTrayX::signalConsole, m_debug, &DebugWidget::slotConsole );
     connect( m_preferences, &Preferences::signalConsole, m_debug, &DebugWidget::slotConsole );
@@ -97,6 +94,14 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
     connect( m_debug, &DebugWidget::signalTest2ButtonClicked, m_win_ctrl, &WindowCtrl::slotWindowTest2 );
     connect( m_debug, &DebugWidget::signalTest3ButtonClicked, m_win_ctrl, &WindowCtrl::slotWindowTest3 );
 
+#ifdef Q_OS_UNIX
+
+    connect( m_win_ctrl, &WindowCtrl::signalHideDefaultIconChange, this, &SysTrayX::slotSelectIconObject );
+
+#endif
+
+    connect( this, &SysTrayX::signalConsole, m_debug, &DebugWidget::slotConsole );
+
     /*
      *  Connect preferences signals
      */
@@ -105,6 +110,7 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
 
     connect( m_preferences, &Preferences::signalDefaultIconTypeChange, m_pref_dialog, &PreferencesDialog::slotDefaultIconTypeChange );
     connect( m_preferences, &Preferences::signalDefaultIconDataChange, m_pref_dialog, &PreferencesDialog::slotDefaultIconDataChange );
+    connect( m_preferences, &Preferences::signalHideDefaultIconChange, m_pref_dialog, &PreferencesDialog::slotHideDefaultIconChange );
     connect( m_preferences, &Preferences::signalIconTypeChange, m_pref_dialog, &PreferencesDialog::slotIconTypeChange );
     connect( m_preferences, &Preferences::signalIconDataChange, m_pref_dialog, &PreferencesDialog::slotIconDataChange );
     connect( m_preferences, &Preferences::signalShowNumberChange, m_pref_dialog, &PreferencesDialog::slotShowNumberChange );
@@ -118,6 +124,7 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
 
     connect( m_preferences, &Preferences::signalDefaultIconTypeChange, m_link, &SysTrayXLink::slotDefaultIconTypeChange );
     connect( m_preferences, &Preferences::signalDefaultIconDataChange, m_link, &SysTrayXLink::slotDefaultIconDataChange );
+    connect( m_preferences, &Preferences::signalHideDefaultIconChange, m_link, &SysTrayXLink::slotHideDefaultIconChange );
     connect( m_preferences, &Preferences::signalIconTypeChange, m_link, &SysTrayXLink::slotIconTypeChange );
     connect( m_preferences, &Preferences::signalIconDataChange, m_link, &SysTrayXLink::slotIconDataChange );
     connect( m_preferences, &Preferences::signalShowNumberChange, m_link, &SysTrayXLink::slotShowNumberChange );
@@ -128,6 +135,7 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
     connect( m_preferences, &Preferences::signalStartMinimizedChange, m_link, &SysTrayXLink::slotStartMinimizedChange );
     connect( m_preferences, &Preferences::signalMinimizeOnCloseChange, m_link, &SysTrayXLink::slotMinimizeOnCloseChange );
     connect( m_preferences, &Preferences::signalDebugChange, m_link, &SysTrayXLink::slotDebugChange );
+    connect( m_preferences, &Preferences::signalHideDefaultIconChange, this,  &SysTrayX::slotSelectIconObjectPref );
 
     connect( m_preferences, &Preferences::signalDebugChange, m_debug, &DebugWidget::slotDebugChange );
 
@@ -136,8 +144,10 @@ SysTrayX::SysTrayX( QObject *parent ) : QObject( parent )
      */
     connect( m_link, &SysTrayXLink::signalAddOnShutdown, this, &SysTrayX::slotAddOnShutdown );
     connect( m_link, &SysTrayXLink::signalWindowState, m_win_ctrl, &WindowCtrl::slotWindowState );
+    connect( m_link, &SysTrayXLink::signalUnreadMail, this, &SysTrayX::slotSetUnreadMail );
     connect( m_link, &SysTrayXLink::signalTitle, m_win_ctrl, &WindowCtrl::slotWindowTitle );
     connect( m_link, &SysTrayXLink::signalVersion, this, &SysTrayX::slotVersion );
+    connect( m_link, &SysTrayXLink::signalKdeIntegration, this, &SysTrayX::slotSelectIconObject );
 
     /*
      *  SysTrayX
@@ -199,13 +209,31 @@ void    SysTrayX::createMenu()
 }
 
 
+/*
+ *  Destroy the icon menu
+ */
+void    SysTrayX::destroyMenu()
+{
+    if( m_tray_icon_menu )
+    {
+        delete m_tray_icon_menu;
+        m_tray_icon_menu = nullptr;
+    }
+}
+
+
 /*
  *  Show / create tray icon
  */
 void    SysTrayX::showTrayIcon()
 {
     if( !m_tray_icon )
-    {
+    {        
+        /*
+         *  Setup tray menu
+         */
+        createMenu();
+
         /*
          *  Create system tray icon
          */
@@ -241,10 +269,14 @@ void    SysTrayX::showTrayIcon()
 
         connect( m_link, &SysTrayXLink::signalUnreadMail, m_tray_icon, &SysTrayXIcon::slotSetUnreadMail );
 
+        connect( this, &SysTrayX::signalUnreadMail, m_tray_icon, &SysTrayXIcon::slotSetUnreadMail );
+
         /*
          *  Show it
          */
         m_tray_icon->show();
+
+        QTimer::singleShot(500, this, &SysTrayX::resendUnreadMail);
     }
 }
 
@@ -271,6 +303,8 @@ void    SysTrayX::hideTrayIcon()
 
         disconnect( m_link, &SysTrayXLink::signalUnreadMail, m_tray_icon, &SysTrayXIcon::slotSetUnreadMail );
 
+        disconnect( this, &SysTrayX::signalUnreadMail, m_tray_icon, &SysTrayXIcon::slotSetUnreadMail );
+
         /*
          *  Hide the icon  first to prevent "ghosts"
          */
@@ -281,49 +315,172 @@ void    SysTrayX::hideTrayIcon()
          */
         delete m_tray_icon;
         m_tray_icon = nullptr;
+
+        /*
+         *  Destroy the mennu
+         */
+        destroyMenu();
+    }
+}
+
+
+#if defined( Q_OS_UNIX ) && defined( KDE_INTEGRATION )
+
+/*
+ *  Show / create tray icon
+ */
+void    SysTrayX::showKdeTrayIcon()
+{
+    if( !m_kde_tray_icon )
+    {
+        /*
+         *  Setup tray menu
+         */
+        createMenu();
+
+        /*
+         *  Create system tray icon
+         */
+        m_kde_tray_icon = new SysTrayXStatusNotifier( m_link, m_preferences );
+        m_kde_tray_icon->setStandardActionsEnabled( false );
+        m_kde_tray_icon->setContextMenu( m_tray_icon_menu );
+
+        /*
+         *  Set default icon
+         */
+        m_kde_tray_icon->setDefaultIconMime( m_preferences->getDefaultIconMime() );
+        m_kde_tray_icon->setDefaultIconData( m_preferences->getDefaultIconData() );
+        m_kde_tray_icon->setDefaultIconType( m_preferences->getDefaultIconType() );
+
+        /*
+         *  Set icon
+         */
+        m_kde_tray_icon->setIconMime( m_preferences->getIconMime() );
+        m_kde_tray_icon->setIconData( m_preferences->getIconData() );
+        m_kde_tray_icon->setIconType( m_preferences->getIconType() );
+
+        /*
+         *  Connect the world
+         */
+        connect( m_kde_tray_icon, &SysTrayXStatusNotifier::signalShowHide, m_win_ctrl, &WindowCtrl::slotShowHide );
+
+        connect( m_preferences, &Preferences::signalDefaultIconTypeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotDefaultIconTypeChange );
+        connect( m_preferences, &Preferences::signalDefaultIconDataChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotDefaultIconDataChange );
+        connect( m_preferences, &Preferences::signalHideDefaultIconChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotHideDefaultIconChange );
+        connect( m_preferences, &Preferences::signalIconTypeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotIconTypeChange );
+        connect( m_preferences, &Preferences::signalIconDataChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotIconDataChange );
+        connect( m_preferences, &Preferences::signalShowNumberChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotShowNumberChange );
+        connect( m_preferences, &Preferences::signalNumberColorChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotNumberColorChange );
+        connect( m_preferences, &Preferences::signalNumberSizeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotNumberSizeChange );
+
+        connect( m_link, &SysTrayXLink::signalUnreadMail, m_kde_tray_icon, &SysTrayXStatusNotifier::slotSetUnreadMail );
+
+        connect( this, &SysTrayX::signalUnreadMail, m_kde_tray_icon, &SysTrayXStatusNotifier::slotSetUnreadMail );
+
+        /*
+         *  Show
+         */
+        QTimer::singleShot(500, this, &SysTrayX::resendUnreadMail);
     }
 }
 
 
 /*
- *  Handle icon show signal
+ *  Hide / remove tray icon
  */
-void    SysTrayX::slotShow()
+void    SysTrayX::hideKdeTrayIcon()
 {
-    showTrayIcon();
-}
-
-
-/*
- *  Handle icon hide signal
- */
-void    SysTrayX::slotHide()
-{
-    hideTrayIcon();
-}
-
-
-/*
- *  Hndle the unread mail signal
- */
-void    SysTrayX::slotUnreadMail( int unread_mail )
-{
-    if( m_preferences->getDefaultIconType() == Preferences::PREF_DEFAULT_ICON_HIDE )
+    if( m_kde_tray_icon )
     {
-        if( unread_mail > 0 )
-        {
-            showTrayIcon();
-        }
-        else
-        {
-            hideTrayIcon();
-        }
+        /*
+         *  Disconnect all signals
+         */
+        disconnect( m_kde_tray_icon, &SysTrayXStatusNotifier::signalShowHide, m_win_ctrl, &WindowCtrl::slotShowHide );
+
+        disconnect( m_preferences, &Preferences::signalDefaultIconTypeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotDefaultIconTypeChange );
+        disconnect( m_preferences, &Preferences::signalDefaultIconDataChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotDefaultIconDataChange );
+        disconnect( m_preferences, &Preferences::signalHideDefaultIconChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotHideDefaultIconChange );
+        disconnect( m_preferences, &Preferences::signalIconTypeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotIconTypeChange );
+        disconnect( m_preferences, &Preferences::signalIconDataChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotIconDataChange );
+        disconnect( m_preferences, &Preferences::signalShowNumberChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotShowNumberChange );
+        disconnect( m_preferences, &Preferences::signalNumberColorChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotNumberColorChange );
+        disconnect( m_preferences, &Preferences::signalNumberSizeChange, m_kde_tray_icon, &SysTrayXStatusNotifier::slotNumberSizeChange );
+
+        disconnect( m_link, &SysTrayXLink::signalUnreadMail, m_kde_tray_icon, &SysTrayXStatusNotifier::slotSetUnreadMail );
+
+        disconnect( this, &SysTrayX::signalUnreadMail, m_kde_tray_icon, &SysTrayXStatusNotifier::slotSetUnreadMail );
+
+        /*
+         *  Remove the notifier icon
+         */
+        delete m_kde_tray_icon;
+        m_kde_tray_icon = nullptr;
+
+        /*
+         *  Destroy the mennu
+         */
+        m_tray_icon_menu = nullptr;
+        //destroyMenu();
+    }
+}
+
+#endif
+
+
+/*
+ *  Select the prefered icon
+ */
+void    SysTrayX::slotSelectIconObjectPref()
+{
+    slotSelectIconObject( m_preferences->getHideDefaultIcon() );
+}
+
+void    SysTrayX::slotSelectIconObject( bool state )
+{
+
+#if defined( Q_OS_UNIX ) && defined( KDE_INTEGRATION )
+
+    if( state )
+    {
+        //  Use the KDE icon object
+//        emit signalConsole("Enable KDE icon");
+
+        //  Remove the Qt tray icon
+        hideTrayIcon();
+
+        //  Setup KDE tray icon
+        showKdeTrayIcon();
     }
     else
     {
-        showTrayIcon();
+        //  Use default Qt system tray icon
+//        emit signalConsole("Enable Qt icon");
 
+        //  Remove KDE trsy icon
+        hideKdeTrayIcon();
+
+        //  Setup the Qt tray icon
+        showTrayIcon();
     }
+
+#else
+
+    Q_UNUSED( state )
+
+    //  Setup the Qt tray icon
+    showTrayIcon();
+
+#endif
+
+}
+
+
+/*
+ *  Resend unread mail
+ */
+void    SysTrayX::resendUnreadMail()
+{
+    emit signalUnreadMail( m_unread_mail );
 }
 
 
@@ -335,7 +492,10 @@ void    SysTrayX::slotAddOnShutdown()
     /*
      *  Hide systray icon to prevent ghost systray icon in Windows
      */
-    m_tray_icon->hide();
+    if( m_tray_icon )
+    {
+        m_tray_icon->hide();
+    }
 
     /*
      *  Close the TB window
@@ -364,7 +524,10 @@ void    SysTrayX::slotShutdown()
         /*
          *  Hide systray icon to prevent ghost systray icon in Windows
          */
-        m_tray_icon->hide();
+        if( m_tray_icon )
+        {
+            m_tray_icon->hide();
+        }
 
         /*
          *  Close the TB window
@@ -410,5 +573,24 @@ void    SysTrayX::slotVersion( QString version )
             m_tray_icon->showMessage("SysTray-X Warning", "Version mismatch addon and app",
                 QSystemTrayIcon::Warning );
         }
+
+#if defined( Q_OS_UNIX ) && defined( KDE_INTEGRATION )
+
+        if( m_kde_tray_icon )
+        {
+            m_kde_tray_icon->showMessage("SysTray-X Warning", "Version mismatch addon and app", ":/files/icons/dialog-warning.png" );
+        }
+
+#endif
+
     }
 }
+
+
+/*
+ *  Handle unread mail signal
+ */
+void    SysTrayX::slotSetUnreadMail( int unread )
+{
+    m_unread_mail = unread;
+}
diff --git a/app/SysTray-X/systrayx.h b/app/SysTray-X/systrayx.h
index 28d5470..efeca60 100644
--- a/app/SysTray-X/systrayx.h
+++ b/app/SysTray-X/systrayx.h
@@ -25,6 +25,8 @@ class SysTrayXIcon;
 class SysTrayXLink;
 class WindowCtrl;
 
+class SysTrayXStatusNotifier;
+
 /**
  * @brief The SysTrayX class
  */
@@ -57,6 +59,11 @@ class SysTrayX : public QObject
          */
         void    createMenu();
 
+        /**
+         * @brief destroyMenu. Destroy the menu.
+         */
+        void    destroyMenu();
+
         /**
          * @brief showTrayIcon. Create and show the icon.
          */
@@ -67,8 +74,34 @@ class SysTrayX : public QObject
          */
         void    hideTrayIcon();
 
+#ifdef Q_OS_UNIX
+
+        /**
+         * @brief showKdeTrayIcon. Create and show the KDE icon.
+         */
+        void    showKdeTrayIcon();
+
+        /**
+         * @brief hideKdeTrayIcon. Hide and destroy the KDE icon.
+         */
+        void    hideKdeTrayIcon();
+
+#endif
+
+        /**
+         * @brief resendUnreadMail. Send another unread mail signal to the icon.
+         */
+        void    resendUnreadMail();
+
     signals:
 
+        /**
+         * @brief signalUnreadMail. Signal numder of unread mails.
+         *
+         * @param unreadMail    The number of unread mails.
+         */
+        void    signalUnreadMail( int unread_mail );
+
         /**
          * @brief signalWriteMessage
          *
@@ -88,17 +121,24 @@ class SysTrayX : public QObject
          */
         void    signalConsole( QString message );
 
-    private slots:
-
-        void    slotShow();
-        void    slotHide();
+    public slots:
 
         /**
-         * @brief slotUnreadMail. Handle unread mail signal.
+         * @brief slotSetUnreadMail. Handle the unred mail signal.
          *
-         *  @param unread_mail  Number of unread mail.
+         *  @param unread   Number of unread mail.
          */
-        void    slotUnreadMail( int unread_mail );
+        void    slotSetUnreadMail( int unread );
+
+    private slots:
+
+        /**
+         * @brief slotSelectIconObject. Select the prefered icon.
+         *
+         *  @param state    The state.
+         */
+        void    slotSelectIconObjectPref();
+        void    slotSelectIconObject( bool state );
 
         /**
          * @brief slotAddOnShutdown. Handle shutdown request from the add-on.
@@ -152,6 +192,11 @@ class SysTrayX : public QObject
          */
         SysTrayXIcon*   m_tray_icon;
 
+        /**
+         * @brief m_kde_tray_icon. Pointer to the KDE system tray icon.
+         */
+        SysTrayXStatusNotifier*   m_kde_tray_icon;
+
         /**
          * @brief m_tray_icon_menu. Pointer to the tray icon menu.
          */
@@ -164,6 +209,11 @@ class SysTrayX : public QObject
         QAction*    m_pref_action;
         QAction*    m_about_action;
         QAction*    m_quit_action;
+
+        /**
+         * @brief m_unread_mail. Number of unread mails
+         */
+        int m_unread_mail;
 };
 
 #endif // SYSTRAYX_H
diff --git a/app/SysTray-X/systrayxicon.cpp b/app/SysTray-X/systrayxicon.cpp
index 47db6f8..7629088 100644
--- a/app/SysTray-X/systrayxicon.cpp
+++ b/app/SysTray-X/systrayxicon.cpp
@@ -212,8 +212,8 @@ void    SysTrayXIcon::setNumberSize( int size )
  */
 void    SysTrayXIcon::setUnreadMail( int unread_mail )
 {
-    if( unread_mail != m_unread_mail ) {
-
+    if( m_unread_mail != unread_mail )
+    {
         /*
          *  Store the new value
          */
@@ -279,7 +279,6 @@ void    SysTrayXIcon::renderIcon()
             case Preferences::PREF_DEFAULT_ICON_HIDE:
             {
                 pixmap = QPixmap();
-
                 break;
             }
 
@@ -403,6 +402,7 @@ void    SysTrayXIcon::slotIconActivated( QSystemTrayIcon::ActivationReason reaso
 {
     switch (reason) {
         case QSystemTrayIcon::Trigger:
+        case QSystemTrayIcon::MiddleClick:
         {
             //  Clicked
             emit signalShowHide();
@@ -410,7 +410,6 @@ void    SysTrayXIcon::slotIconActivated( QSystemTrayIcon::ActivationReason reaso
         }
 
         case QSystemTrayIcon::DoubleClick:
-        case QSystemTrayIcon::MiddleClick:
         {
             break;
         }
diff --git a/app/SysTray-X/systrayxlink.cpp b/app/SysTray-X/systrayxlink.cpp
index 823ba03..513c2fa 100644
--- a/app/SysTray-X/systrayxlink.cpp
+++ b/app/SysTray-X/systrayxlink.cpp
@@ -250,6 +250,26 @@ void    SysTrayXLink::sendShutdown()
 }
 
 
+/*
+ *  Send disable KDE integration to the add-on
+ */
+void    SysTrayXLink::sendDisableKdeIntegration()
+{
+    QJsonObject shutdownObject;
+    shutdownObject.insert("kdeIntegration", QJsonValue::fromVariant( "false" ) );
+
+    /*
+     *  Store the new document
+     */
+    QJsonDocument json_doc = QJsonDocument( shutdownObject );
+
+    /*
+     *  Send it to the add-on
+     */
+    linkWrite( json_doc.toJson( QJsonDocument::Compact ) );
+}
+
+
 /*
  *  Decode JSON message
  */
@@ -262,6 +282,14 @@ void    SysTrayXLink::DecodeMessage( const QByteArray& message )
     {
         QJsonObject jsonObject = jsonResponse.object();
 
+/*
+        QStringList list = jsonObject.keys();
+        for( int i = 0 ;  i < list.length() ; ++i )
+        {
+            emit signalConsole( QString("Message %1").arg(list.at(i)) );
+        }
+*/
+
         if( jsonObject.contains( "unreadMail" ) && jsonObject[ "unreadMail" ].isDouble() )
         {
             int unreadMail = jsonObject[ "unreadMail" ].toInt();
@@ -289,10 +317,6 @@ void    SysTrayXLink::DecodeMessage( const QByteArray& message )
         {
             QString window_state_str = jsonObject[ "window" ].toString();
 
-
-            emit signalConsole( QString( "Window state (%1)" ).arg( window_state_str ) );
-
-
             int window_state;
             if( window_state_str == Preferences::STATE_NORMAL_STR )
             {
@@ -323,14 +347,28 @@ void    SysTrayXLink::DecodeMessage( const QByteArray& message )
                 /*
                  *  Unknown state
                  */
-                emit signalConsole( QString( "Error: unknow window state (%1)" ).arg( window_state_str ) );
-
                 window_state = Preferences::STATE_NORMAL;
             }
 
             emit signalWindowState( window_state );
         }
 
+        if( jsonObject.contains( "hideDefaultIcon" ) && jsonObject[ "hideDefaultIcon" ].isBool() )
+        {
+            bool hide_default_icon = jsonObject[ "hideDefaultIcon" ].toBool();
+
+            /*
+             *  Signal the KDE integration or hide default icon
+             */
+            emit signalKdeIntegration( hide_default_icon );
+
+#if defined( Q_OS_UNIX ) && defined( NO_KDE_INTEGRATION )
+
+            sendDisableKdeIntegration();
+
+#endif
+        }
+
         if( jsonObject.contains( "platformInfo" ) && jsonObject[ "platformInfo" ].isObject() )
         {
             DecodePlatform( jsonObject[ "platformInfo" ].toObject() );
@@ -477,6 +515,16 @@ void    SysTrayXLink::DecodePreferences( const QJsonObject& pref )
         m_pref->setDefaultIconData( QByteArray::fromBase64( icon_base64.toUtf8() ) );
     }
 
+    if( pref.contains( "hideDefaultIcon" ) && pref[ "hideDefaultIcon" ].isString() )
+    {
+        bool hide_default_icon = pref[ "hideDefaultIcon" ].toString() == "true";
+
+        /*
+         *  Store the new start minimized state
+         */
+        m_pref->setHideDefaultIcon( hide_default_icon );
+    }
+
     if( pref.contains( "iconType" ) && pref[ "iconType" ].isString() )
     {
         Preferences::IconType icon_type = static_cast< Preferences::IconType >( pref[ "iconType" ].toString().toInt() );
@@ -604,6 +652,7 @@ void    SysTrayXLink::EncodePreferences( const Preferences& pref )
     prefObject.insert("defaultIconType", QJsonValue::fromVariant( QString::number( pref.getDefaultIconType() ) ) );
     prefObject.insert("defaultIconMime", QJsonValue::fromVariant( pref.getDefaultIconMime() ) );
     prefObject.insert("defaultIcon", QJsonValue::fromVariant( QString( pref.getDefaultIconData().toBase64() ) ) );
+    prefObject.insert("hideDefaultIcon", QJsonValue::fromVariant( QString( pref.getHideDefaultIcon() ? "true" : "false" ) ) );
     prefObject.insert("iconType", QJsonValue::fromVariant( QString::number( pref.getIconType() ) ) );
     prefObject.insert("iconMime", QJsonValue::fromVariant( pref.getIconMime() ) );
     prefObject.insert("icon", QJsonValue::fromVariant( QString( pref.getIconData().toBase64() ) ) );
@@ -715,6 +764,18 @@ void    SysTrayXLink::slotDefaultIconDataChange()
 }
 
 
+/*
+ *  Handle the hide default icon change signal
+ */
+void    SysTrayXLink::slotHideDefaultIconChange()
+{
+    if( m_pref->getAppPrefChanged() )
+    {
+        sendPreferences();
+    }
+}
+
+
 /*
  *  Handle the icon type change signal
  */
diff --git a/app/SysTray-X/systrayxlink.h b/app/SysTray-X/systrayxlink.h
index 7afa13f..07f631f 100644
--- a/app/SysTray-X/systrayxlink.h
+++ b/app/SysTray-X/systrayxlink.h
@@ -115,6 +115,11 @@ class SysTrayXLink : public QObject
          */
         void    sendShutdown();
 
+        /**
+         * @brief sendDisableKdeIntegration. Disable KDE integration.
+         */
+        void    sendDisableKdeIntegration();
+
     private:
 
         /**
@@ -181,6 +186,13 @@ class SysTrayXLink : public QObject
          */
         void    signalWindowState( int state );
 
+        /**
+         * @brief signalKdeIntegration. Signal KDE integration (and use the KStatusNotifierItem icon)
+         *
+         *   @param state   The prefered state
+         */
+        void    signalKdeIntegration( bool state );
+
         /**
          * @brief signalUnreadMail. Signal numder of unread mails.
          *
@@ -220,6 +232,11 @@ class SysTrayXLink : public QObject
          */
         void    slotDefaultIconDataChange();
 
+        /**
+         * @brief slotHideDefaultIconChange. Slot for handling hide default icon change signals.
+         */
+        void    slotHideDefaultIconChange();
+
         /**
          * @brief slotIconTypeChange. Slot for handling icon type change signals.
          */
diff --git a/app/SysTray-X/systrayxstatusnotifier.cpp b/app/SysTray-X/systrayxstatusnotifier.cpp
new file mode 100644
index 0000000..c24eb0a
--- /dev/null
+++ b/app/SysTray-X/systrayxstatusnotifier.cpp
@@ -0,0 +1,485 @@
+#include "systrayxstatusnotifier.h"
+
+#if defined( Q_OS_UNIX ) && defined( KDE_INTEGRATION )
+
+/*
+ *	Local includes
+ */
+#include "preferences.h"
+
+/*
+ *  System includes
+ */
+#include "systrayxlink.h"
+
+/*
+ *	Qt includes
+ */
+#include <QIcon>
+#include <QTimer>
+#include <QPixmap>
+#include <QPainter>
+
+
+/*
+ *	Constructor
+ */
+SysTrayXStatusNotifier::SysTrayXStatusNotifier( SysTrayXLink* link, Preferences* pref, QObject* parent )
+    : KStatusNotifierItem( parent )
+{
+    /*
+     *  Initialize
+     */
+    m_link = link;
+    m_pref = pref;
+
+    m_unread_mail = 0;
+
+    m_show_number = m_pref->getShowNumber();
+    m_number_color = m_pref->getNumberColor();
+    m_number_size = m_pref->getNumberSize();
+
+    /*
+     * Setup notifier
+     */
+    setCategory( KStatusNotifierItem::ApplicationStatus );
+
+    setIconByPixmap( QIcon( QPixmap( ":/files/icons/Thunderbird.png") ) );
+    setTitle("SysTray-X");
+
+    setStatus( KStatusNotifierItem::ItemStatus::Passive );
+    m_hide_default_icon = true;
+
+//  setStatus(KStatusNotifierItem::ItemStatus::Active);
+//  setStatus(KStatusNotifierItem::ItemStatus::NeedsAttention);
+
+    connect( this, &KStatusNotifierItem::activateRequested, this, &SysTrayXStatusNotifier::slotActivateRequested );
+    connect( this, &KStatusNotifierItem::secondaryActivateRequested, this, &SysTrayXStatusNotifier::slotSecondaryActivateRequested );
+}
+
+
+/*
+ *  Set the default icon type
+ */
+void    SysTrayXStatusNotifier::setDefaultIconType( Preferences::DefaultIconType icon_type )
+{
+    if( m_default_icon_type != icon_type )
+    {
+        /*
+         *  Store the new value
+         */
+        m_default_icon_type = icon_type;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set the default icon mime
+ */
+void    SysTrayXStatusNotifier::setDefaultIconMime( const QString& icon_mime )
+{
+    if( m_default_icon_mime != icon_mime )
+    {
+        /*
+         *  Store the new value
+         */
+        m_default_icon_mime = icon_mime;
+    }
+}
+
+
+/*
+ *  Set the default icon data
+ */
+void    SysTrayXStatusNotifier::setDefaultIconData( const QByteArray& icon_data )
+{
+    if( m_default_icon_data != icon_data )
+    {
+        /*
+         *  Store the new value
+         */
+        m_default_icon_data = icon_data;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set the hide default icon
+ */
+void    SysTrayXStatusNotifier::setHideDefaultIcon( bool hide )
+{
+    if( m_hide_default_icon != hide )
+    {
+        /*
+         *  Store the new value
+         */
+        m_hide_default_icon = hide;
+    }
+}
+
+
+/*
+ *  Set the icon type
+ */
+void    SysTrayXStatusNotifier::setIconType( Preferences::IconType icon_type )
+{
+    if( icon_type != m_icon_type )
+    {
+        /*
+         *  Store the new value
+         */
+        m_icon_type = icon_type;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set the icon mime
+ */
+void    SysTrayXStatusNotifier::setIconMime( const QString& icon_mime )
+{
+    if( m_icon_mime != icon_mime )
+    {
+        /*
+         *  Store the new value
+         */
+        m_icon_mime = icon_mime;
+    }
+}
+
+
+/*
+ *  Set the icon data
+ */
+void    SysTrayXStatusNotifier::setIconData( const QByteArray& icon_data )
+{
+    if( m_icon_data != icon_data )
+    {
+        /*
+         *  Store the new value
+         */
+        m_icon_data = icon_data;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Enable/disable number
+ */
+void    SysTrayXStatusNotifier::showNumber( bool state )
+{
+    if( m_show_number != state )
+    {
+        /*
+         *  Store the new value
+         */
+        m_show_number = state;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set number color
+ */
+void    SysTrayXStatusNotifier::setNumberColor( const QString& color )
+{
+    if( m_number_color != color )
+    {
+        /*
+         *  Store the new value
+         */
+        m_number_color = color;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set number size
+ */
+void    SysTrayXStatusNotifier::setNumberSize( int size )
+{
+    if( m_number_size != size )
+    {
+        /*
+         *  Store the new value
+         */
+        m_number_size = size;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+/*
+ *  Set the number of unread mails
+ */
+void    SysTrayXStatusNotifier::setUnreadMail( int unread_mail )
+{
+    if( m_unread_mail != unread_mail )
+    {
+        /*
+         *  Store the new value
+         */
+        m_unread_mail = unread_mail;
+
+        /*
+         *  Render and set a new icon in the tray
+         */
+        renderIcon();
+    }
+}
+
+
+/*
+ *  Set and render the icon in the system tray
+ */
+void    SysTrayXStatusNotifier::renderIcon()
+{
+    QPixmap pixmap;
+
+    if( m_unread_mail > 0 )
+    {
+        switch( m_icon_type )
+        {
+            case Preferences::PREF_BLANK_ICON:
+            {
+                pixmap = QPixmap( ":/files/icons/blank-icon.png" );
+                break;
+            }
+
+            case Preferences::PREF_NEWMAIL_ICON:
+            {
+                QIcon new_mail = QIcon::fromTheme("mail-unread", QIcon(":/files/icons/mail-unread.png"));
+                pixmap = new_mail.pixmap( 256, 256 );
+                break;
+            }
+
+            case Preferences::PREF_CUSTOM_ICON:
+            {
+                pixmap.loadFromData( m_icon_data );
+                break;
+            }
+
+            case Preferences::PREF_NO_ICON:
+            {
+                QPixmap lookthrough( 256, 256 );
+                lookthrough.fill( Qt::transparent );
+                pixmap = lookthrough;
+                break;
+            }
+        }
+    }
+    else
+    {
+        switch( m_default_icon_type )
+        {
+            case Preferences::PREF_DEFAULT_ICON_DEFAULT:
+            {
+                pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                break;
+            }
+
+            case Preferences::PREF_DEFAULT_ICON_HIDE:
+            {
+                pixmap = QPixmap();
+                break;
+            }
+
+            case Preferences::PREF_DEFAULT_ICON_CUSTOM:
+            {
+                pixmap.loadFromData( m_default_icon_data );
+                break;
+            }
+        }
+    }
+
+    if( m_show_number && ( m_unread_mail > 0 ) )
+    {
+        /*
+         *  Paint the number
+         */
+        QPainter painter( &pixmap );
+
+        painter.setFont( QFont("Sans") );
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 13, 0)
+        double factor = pixmap.width() / ( 3 * painter.fontMetrics().width( "0" ) );
+#else
+        double factor = pixmap.width() / ( 3 * painter.fontMetrics().horizontalAdvance( "0" ) );
+#endif
+        QFont font = painter.font();
+        font.setPointSizeF( font.pointSizeF() * ( factor * m_number_size / 10 ) );
+        font.setBold( true );
+        painter.setFont( font );
+
+        painter.setPen( QColor( m_number_color ) );
+
+        painter.drawText( pixmap.rect(), Qt::AlignCenter, QString::number( m_unread_mail ) );
+    }
+
+    /*
+     *  Set the tray icon
+     */
+    setIconByPixmap( QIcon( pixmap ) );
+
+    /*
+     *  Hide the icon?
+     */
+    if( m_hide_default_icon && m_unread_mail == 0 )
+    {
+        setStatus( KStatusNotifierItem::ItemStatus::Passive );
+    }
+    else
+    {
+        QTimer::singleShot(500, this, &SysTrayXStatusNotifier::showIcon);
+    }
+}
+
+
+void    SysTrayXStatusNotifier::showIcon()
+{
+    if( !m_hide_default_icon || m_unread_mail > 0 )
+    {
+        setStatus( KStatusNotifierItem::ItemStatus::Active );
+    }
+}
+
+
+/*
+ *  Handle unread mail signal
+ */
+void    SysTrayXStatusNotifier::slotSetUnreadMail( int unread_mail )
+{
+    setUnreadMail( unread_mail );
+}
+
+
+/*
+ *  Handle the default icon type change signal
+ */
+void    SysTrayXStatusNotifier::slotDefaultIconTypeChange()
+{
+    setDefaultIconType( m_pref->getDefaultIconType() );
+}
+
+
+/*
+ *  Handle the default icon data change signal
+ */
+void    SysTrayXStatusNotifier::slotDefaultIconDataChange()
+{
+    setDefaultIconMime( m_pref->getDefaultIconMime() );
+    setDefaultIconData( m_pref->getDefaultIconData() );
+}
+
+
+/*
+ *  Handle the hide default icon change signal
+ */
+void    SysTrayXStatusNotifier::slotHideDefaultIconChange()
+{
+    setHideDefaultIcon( m_pref->getHideDefaultIcon() );
+}
+
+
+/*
+ *  Handle the icon type change signal
+ */
+void    SysTrayXStatusNotifier::slotIconTypeChange()
+{
+    setIconType( m_pref->getIconType() );
+}
+
+
+/*
+ *  Handle the icon data change signal
+ */
+void    SysTrayXStatusNotifier::slotIconDataChange()
+{
+    setIconMime( m_pref->getIconMime() );
+    setIconData( m_pref->getIconData() );
+}
+
+
+/*
+ *  Handle the enable number state change signal
+ */
+void    SysTrayXStatusNotifier::slotShowNumberChange()
+{
+    showNumber( m_pref->getShowNumber() );
+}
+
+
+/*
+ *  Handle the number color change signal
+ */
+void    SysTrayXStatusNotifier::slotNumberColorChange()
+{
+    setNumberColor( m_pref->getNumberColor() );
+}
+
+
+/*
+ *  Handle the number size change signal
+ */
+void    SysTrayXStatusNotifier::slotNumberSizeChange()
+{
+    setNumberSize( m_pref->getNumberSize() );
+}
+
+
+/*
+ *  Handle activate request of the notification icon
+ */
+void    SysTrayXStatusNotifier::slotActivateRequested( bool active, const QPoint &pos )
+{
+    Q_UNUSED( active )
+    Q_UNUSED( pos )
+
+    emit signalShowHide();
+}
+
+
+/*
+ *  Handle secondary activate request of the notification icon
+ */
+void    SysTrayXStatusNotifier::slotSecondaryActivateRequested( const QPoint &pos )
+{
+    Q_UNUSED( pos )
+
+    emit signalShowHide();
+}
+
+#endif
diff --git a/app/SysTray-X/systrayxstatusnotifier.h b/app/SysTray-X/systrayxstatusnotifier.h
new file mode 100644
index 0000000..4f1beb5
--- /dev/null
+++ b/app/SysTray-X/systrayxstatusnotifier.h
@@ -0,0 +1,272 @@
+#include <QtGlobal>
+#if defined( Q_OS_UNIX ) && defined( KDE_INTEGRATION )
+
+#ifndef SYSTRAYXSTATUSNOTIFIER_H
+#define SYSTRAYXSTATUSNOTIFIER_H
+
+
+/*
+ *	Local includes
+ */
+#include "preferences.h"
+
+/*
+ *	Qt includes
+ */
+#include <KStatusNotifierItem>
+
+/*
+ *	Predefines
+ */
+class SysTrayXLink;
+
+
+/**
+ * @brief The SysTrayXStatusNotifier class. The system tray icon.
+ */
+class SysTrayXStatusNotifier : public KStatusNotifierItem
+{
+    Q_OBJECT
+
+    public:
+
+        /**
+         * @brief SysTrayXStatusNotifier. Constructor.
+         *
+         *  @param parent   My parent.
+         */
+        SysTrayXStatusNotifier( SysTrayXLink* link, Preferences* pref, QObject* parent = nullptr );
+
+        /**
+         * @brief setDefaultIconType. Set the sytem tray default icon type.
+         *
+         *  @param icon_type    The icon type
+         */
+        void    setDefaultIconType( Preferences::DefaultIconType icon_type );
+
+        /**
+         * @brief setDefaultIconMime. Set the sytem tray icon mime.
+         *
+         *  @param icon_mime    The icon mime
+         */
+        void    setDefaultIconMime( const QString& icon_mime );
+
+        /**
+         * @brief setDefaultIconData. Set the custom icon data.
+         *
+         *  @param icon_data    The icon data.
+         */
+        void    setDefaultIconData( const QByteArray& icon_data );
+
+        /**
+         * @brief setHideDefaultIcon. Set hide default icon.
+         *
+         *  @param hide    The state
+         */
+        void    setHideDefaultIcon( bool hide );
+
+        /**
+         * @brief setIconType. Set the sytem tray icon type.
+         *
+         *  @param icon_type    The icon type
+         */
+        void    setIconType( Preferences::IconType icon_type );
+
+        /**
+         * @brief setIconMime. Set the sytem tray icon mime.
+         *
+         *  @param icon_mime    The icon mime
+         */
+        void    setIconMime( const QString& icon_mime );
+
+        /**
+         * @brief setIconData. Set the custom icon data.
+         *
+         *  @param icon_data    The icon data.
+         */
+        void    setIconData( const QByteArray& icon_data );
+
+        /**
+         * @brief showNumber. Set the show number state.
+         *
+         *  @param state    Show / hide.
+         */
+        void    showNumber( bool state );
+
+        /**
+         * @brief setNumberColor. Set the number color.
+         *
+         *  @param color    The color.
+         */
+        void    setNumberColor( const QString& color );
+
+        /**
+         * @brief setNumberSize. Set the number size.
+         *
+         *  @param size    The size.
+         */
+        void    setNumberSize( int size );
+
+        /**
+         * @brief setUnreadMail. Set the number of unread mails.
+         *
+         *  @param unread_mail  The number of unread mails.
+         */
+        void    setUnreadMail( int unread_mail );
+
+    private:
+
+        /**
+         * @brief setIcon. Set a new rendered icon.
+         */
+        void    renderIcon();
+
+        /**
+         * @brief showIcon. Show the icon.
+         */
+        void    showIcon();
+
+    signals:
+
+        /**
+         * @brief signalShowHide. Signal show / hide window.
+         */
+        void    signalShowHide();
+
+    public slots:
+
+        /**
+         * @brief slotSetUnreadMail. Slot for handling unread mail signals.
+         *
+         *  @param unread_mail  The number of unread mails.
+         */
+        void    slotSetUnreadMail( int unread_mail );
+
+        /**
+         * @brief slotDefaultIconTypeChange. Slot for handling default icon type change signals.
+         */
+        void    slotDefaultIconTypeChange();
+
+        /**
+         * @brief slotDefaultIconDataChange. Slot for handling default icon data change signals.
+         */
+        void    slotDefaultIconDataChange();
+
+        /**
+         * @brief slotHideDefaultIconChange. Slot for handling hide default icon change signals.
+         */
+        void    slotHideDefaultIconChange();
+
+        /**
+         * @brief slotIconTypeChange. Slot for handling icon type change signals.
+         */
+        void    slotIconTypeChange();
+
+        /**
+         * @brief slotIconDataChange. Slot for handling icon data change signals.
+         */
+        void    slotIconDataChange();
+
+        /**
+         * @brief slotShowNumberChange. Slot for handling show number change signals.
+         */
+        void    slotShowNumberChange();
+
+        /**
+         * @brief slotNumberColorChange. Slot for handling number color change signals.
+         */
+        void    slotNumberColorChange();
+
+        /**
+         * @brief slotNumberSizeChange. Slot for handling number size change signals.
+         */
+        void    slotNumberSizeChange();
+
+    private slots:
+
+        /**
+         * @brief slotActivateRequested. Handle a activate request of the notifier.
+         *
+         *  @param active       Window request show / hide.
+         *  @param pos          Click position.
+         */
+        void    slotActivateRequested( bool active, const QPoint &pos );
+
+        /**
+         * @brief slotSecondaryActivateRequested. Handle a secondary activate request of the notifier.
+         *
+         *  @param pos          Click position.
+         */
+        void    slotSecondaryActivateRequested( const QPoint &pos );
+
+    private:
+
+        /**
+         * @brief m_link.   Pointer to the link.
+         */
+        SysTrayXLink*   m_link;
+
+        /**
+         * @brief m_pref    Pointer to the preferences storage.
+         */
+        Preferences*    m_pref;
+
+        /**
+         * @brief m_default_icon_type. Storage for the default icon type.
+         */
+        Preferences::DefaultIconType   m_default_icon_type;
+
+        /**
+         * @brief m_default_icon_mime. Storage for the default icon mime.
+         */
+        QString m_default_icon_mime;
+
+        /**
+         * @brief m_default_icon_data. Storage for the default icon.
+         */
+        QByteArray  m_default_icon_data;
+
+        /**
+         * @brief m_hide_default_icon. Storage for the hide default icon state.
+         */
+        bool    m_hide_default_icon;
+
+        /**
+         * @brief m_icon_type. Storage for the icon type.
+         */
+        Preferences::IconType   m_icon_type;
+
+        /**
+         * @brief m_icon_mime. Storage for the icon mime.
+         */
+        QString m_icon_mime;
+
+        /**
+         * @brief m_icon_data. Storage for the icon.
+         */
+        QByteArray  m_icon_data;
+
+        /**
+         * @brief m_show_number. Show the unread mail count.
+         */
+        bool m_show_number;
+
+        /**
+         * @brief m_number_color. Color of the unread mail number.
+         */
+        QString m_number_color;
+
+        /**
+         * @brief m_number_size. Size of the unread mail number.
+         */
+        int m_number_size;
+
+        /**
+         * @brief m_unread_mail. Storage for the number of unread mails.
+         */
+        int m_unread_mail;
+};
+
+#endif // SYSTRAYXSTATUSNOTIFIER_H
+
+#endif
diff --git a/app/SysTray-X/windowctrl.cpp b/app/SysTray-X/windowctrl.cpp
index cfc3b18..148648a 100644
--- a/app/SysTray-X/windowctrl.cpp
+++ b/app/SysTray-X/windowctrl.cpp
@@ -68,6 +68,8 @@ void    WindowCtrl::slotWindowTest1()
 
     // Do something.
 
+//    signalHideDefaultIconChange( true );
+
 //    emit signalShow();
 
 //    emit signalConsole( QString( "Found Ppid: %1" ).arg( getPpid() ) );
@@ -91,6 +93,8 @@ void    WindowCtrl::slotWindowTest2()
 
     // Do something.
 
+//    signalHideDefaultIconChange( false );
+
 //    emit signalHide();
 
 //    hideWindow( getWinId(), true );
diff --git a/app/SysTray-X/windowctrl.h b/app/SysTray-X/windowctrl.h
index c74f4f8..dc531eb 100644
--- a/app/SysTray-X/windowctrl.h
+++ b/app/SysTray-X/windowctrl.h
@@ -49,8 +49,10 @@ class WindowCtrl : public QObject
 
     signals:
 
-        void    signalShow();
-        void    signalHide();
+//        void    signalShow();
+//        void    signalHide();
+
+        void    signalHideDefaultIconChange(bool hide );
 
     public slots:
 
diff --git a/dist/deb/gnome/debian.control b/dist/deb/gnome/debian.control
index 41645c5..70c5b72 100644
--- a/dist/deb/gnome/debian.control
+++ b/dist/deb/gnome/debian.control
@@ -2,7 +2,7 @@ Source: systray-x-gnome
 Section: misc
 Priority: optional
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
-Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, qdbus-qt5, libkf5notifications-dev, thunderbird
 
 Package: systray-x-gnome
 Architecture: any
diff --git a/dist/deb/gnome/debian.rules b/dist/deb/gnome/debian.rules
index 4e79392..332e610 100644
--- a/dist/deb/gnome/debian.rules
+++ b/dist/deb/gnome/debian.rules
@@ -34,7 +34,7 @@ build-stamp:
 	# Add here commands to compile the package.
 	sed < app/config/linux/SysTray_X.json.template -e 's|SYSTRAY_X_PATH|/usr/bin/SysTray-X|' > SysTray_X.json
 
-	make EXT_VERSION="DEFINES+=EXT_VERSION DEFINES+=APP_VERSION_MAJOR=\\\\\\\\\\\\\\\"$(VERSION_MAJOR)\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_MINOR=\\\\\\\\\\\\\\\"$(VERSION_MINOR)\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_PATCH=\\\\\\\\\\\\\\\"$(VERSION_PATCH)\\\\\\\\\\\\\\\" DEFINES+=APP_BUILD=\\\\\\\\\\\\\\\"$(BUILD_NUMBER)\\\\\\\\\\\\\\\" DEFINES+=APP_GITHASH=\\\\\\\\\\\\\\\"$(GIT_HASH)\\\\\\\\\\\\\\\" DEFINES+=APP_GITBRANCH=\\\\\\\\\\\\\\\"$(GIT_BRANCH)\\\\\\\\\\\\\\\""
+	make OPTIONS="DEFINES+=NO_KDE_INTEGRATION" EXT_VERSION="DEFINES+=EXT_VERSION DEFINES+=APP_VERSION_MAJOR=\\\\\\\\\\\\\\\"$(VERSION_MAJOR)\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_MINOR=\\\\\\\\\\\\\\\"$(VERSION_MINOR)\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_PATCH=\\\\\\\\\\\\\\\"$(VERSION_PATCH)\\\\\\\\\\\\\\\" DEFINES+=APP_BUILD=\\\\\\\\\\\\\\\"$(BUILD_NUMBER)\\\\\\\\\\\\\\\" DEFINES+=APP_GITHASH=\\\\\\\\\\\\\\\"$(GIT_HASH)\\\\\\\\\\\\\\\" DEFINES+=APP_GITBRANCH=\\\\\\\\\\\\\\\"$(GIT_BRANCH)\\\\\\\\\\\\\\\""
 
 	# --- end custom part for compiling
 
diff --git a/dist/deb/gnome/systray-x-gnome.dsc b/dist/deb/gnome/systray-x-gnome.dsc
index 87af383..cd66959 100644
--- a/dist/deb/gnome/systray-x-gnome.dsc
+++ b/dist/deb/gnome/systray-x-gnome.dsc
@@ -4,4 +4,4 @@ Version: 0
 Binary: systray-x-gnome
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
 Architecture: any
-Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, qdbus-qt5, libkf5notifications-dev, thunderbird
diff --git a/dist/deb/kde/debian.control b/dist/deb/kde/debian.control
index a0e5705..c2717a1 100644
--- a/dist/deb/kde/debian.control
+++ b/dist/deb/kde/debian.control
@@ -2,7 +2,7 @@ Source: systray-x
 Section: misc
 Priority: optional
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
-Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, qdbus-qt5, libkf5notifications-dev, thunderbird
 
 Package: systray-x
 Architecture: any
diff --git a/dist/deb/kde/systray-x.dsc b/dist/deb/kde/systray-x.dsc
index a4209ba..c70a264 100644
--- a/dist/deb/kde/systray-x.dsc
+++ b/dist/deb/kde/systray-x.dsc
@@ -4,4 +4,4 @@ Version: 0
 Binary: SysTray-X
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
 Architecture: any
-Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, qt5-default, qtbase5-dev, qdbus-qt5, libkf5notifications-dev, thunderbird
diff --git a/dist/rpm/gnome/systray-x-gnome.spec b/dist/rpm/gnome/systray-x-gnome.spec
index 5ba6b61..995902e 100644
--- a/dist/rpm/gnome/systray-x-gnome.spec
+++ b/dist/rpm/gnome/systray-x-gnome.spec
@@ -28,12 +28,15 @@ BuildRequires:  unzip
 BuildRequires:  zip
 BuildRequires:  pkgconfig(Qt5Core)
 BuildRequires:  pkgconfig(Qt5Widgets)
+BuildRequires:  pkgconfig(Qt5DBus)
 BuildRequires:  pkgconfig(x11)
 Requires:       gnome-shell-extension-appindicator
 %if 0%{?fedora_version}
+BuildRequires:  kf5-knotifications-devel
 Requires:       qt5-qtwayland
 Requires:       thunderbird >= 68
 %else
+BuildRequires:  knotifications-devel
 Requires:       MozillaThunderbird >= 68
 %endif
 
@@ -65,7 +68,7 @@ export BUILD_NUMBER=`cat %{S:1} | grep BUILD_NUMBER | sed -e "s/BUILD_NUMBER=\(.
 export GIT_HASH=`cat %{S:1} | grep GIT_HASH | sed -e "s/GIT_HASH=\(.*\)/\1/"`
 export GIT_BRANCH=`cat %{S:1} | grep GIT_BRANCH | sed -e "s/GIT_BRANCH=\(.*\)/\1/"`
 
-make %{?_smp_mflags} EXT_VERSION="DEFINES+=EXT_VERSION DEFINES+=APP_VERSION_MAJOR=\\\\\\\\\\\\\\\"$VERSION_MAJOR\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_MINOR=\\\\\\\\\\\\\\\"$VERSION_MINOR\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_PATCH=\\\\\\\\\\\\\\\"$VERSION_PATCH\\\\\\\\\\\\\\\" DEFINES+=APP_BUILD=\\\\\\\\\\\\\\\"$BUILD_NUMBER\\\\\\\\\\\\\\\" DEFINES+=APP_GITHASH=\\\\\\\\\\\\\\\"$GIT_HASH\\\\\\\\\\\\\\\" DEFINES+=APP_GITBRANCH=\\\\\\\\\\\\\\\"$GIT_BRANCH\\\\\\\\\\\\\\\""
+make %{?_smp_mflags} OPTIONS="DEFINES+=NO_KDE_INTEGRATION" EXT_VERSION="DEFINES+=EXT_VERSION DEFINES+=APP_VERSION_MAJOR=\\\\\\\\\\\\\\\"$VERSION_MAJOR\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_MINOR=\\\\\\\\\\\\\\\"$VERSION_MINOR\\\\\\\\\\\\\\\" DEFINES+=APP_VERSION_PATCH=\\\\\\\\\\\\\\\"$VERSION_PATCH\\\\\\\\\\\\\\\" DEFINES+=APP_BUILD=\\\\\\\\\\\\\\\"$BUILD_NUMBER\\\\\\\\\\\\\\\" DEFINES+=APP_GITHASH=\\\\\\\\\\\\\\\"$GIT_HASH\\\\\\\\\\\\\\\" DEFINES+=APP_GITBRANCH=\\\\\\\\\\\\\\\"$GIT_BRANCH\\\\\\\\\\\\\\\""
 
 sed < app/config/linux/SysTray_X.json.template -e 's|SYSTRAY_X_PATH|%{_bindir}/SysTray-X|' > SysTray_X.json
 
diff --git a/dist/rpm/kde/systray-x.spec b/dist/rpm/kde/systray-x.spec
index daf04be..f16393c 100644
--- a/dist/rpm/kde/systray-x.spec
+++ b/dist/rpm/kde/systray-x.spec
@@ -28,11 +28,14 @@ BuildRequires:  unzip
 BuildRequires:  zip
 BuildRequires:  pkgconfig(Qt5Core)
 BuildRequires:  pkgconfig(Qt5Widgets)
+BuildRequires:  pkgconfig(Qt5DBus)
 BuildRequires:  pkgconfig(x11)
 %if 0%{?fedora_version}
+BuildRequires:  kf5-knotifications-devel
 Requires:       qt5-qtwayland
 Requires:       thunderbird >= 68
 %else
+BuildRequires:  knotifications-devel
 Requires:       MozillaThunderbird >= 68
 %endif
 
diff --git a/webext/background.js b/webext/background.js
index 25a7448..46024e5 100644
--- a/webext/background.js
+++ b/webext/background.js
@@ -3,6 +3,8 @@ var SysTrayX = {
 
   startupState: undefined,
 
+  hideDefaultIcon: false,
+
   platformInfo: undefined,
 
   browserInfo: undefined,
@@ -31,6 +33,9 @@ SysTrayX.Messaging = {
     //  Send version to app
     SysTrayX.Messaging.sendVersion();
 
+    //  Send hide default icon preference
+    SysTrayX.Messaging.sendHideDefaultIcon();
+
     //  Send preferences to app
     SysTrayX.Messaging.sendPreferences();
 
@@ -137,6 +142,12 @@ SysTrayX.Messaging = {
     SysTrayX.Link.postSysTrayXMessage({ version: SysTrayX.version });
   },
 
+  sendHideDefaultIcon: function () {
+    SysTrayX.Link.postSysTrayXMessage({
+      hideDefaultIcon: SysTrayX.hideDefaultIcon,
+    });
+  },
+
   sendPreferences: function () {
     const getter = browser.storage.sync.get([
       "debug",
@@ -146,6 +157,7 @@ SysTrayX.Messaging = {
       "defaultIconType",
       "defaultIconMime",
       "defaultIcon",
+      "hideDefaultIcon",
       "iconType",
       "iconMime",
       "icon",
@@ -165,6 +177,7 @@ SysTrayX.Messaging = {
     const defaultIconType = result.defaultIconType || "0";
     const defaultIconMime = result.defaultIconMime || "image/png";
     const defaultIcon = result.defaultIcon || [];
+    const hideDefaultIcon = result.hideDefaultIcon || "false";
     const iconType = result.iconType || "0";
     const iconMime = result.iconMime || "image/png";
     const icon = result.icon || [];
@@ -183,6 +196,7 @@ SysTrayX.Messaging = {
         defaultIconType: defaultIconType,
         defaultIconMime: defaultIconMime,
         defaultIcon: defaultIcon,
+        hideDefaultIcon: hideDefaultIcon,
         iconType: iconType,
         iconMime: iconMime,
         icon: icon,
@@ -256,6 +270,13 @@ SysTrayX.Link = {
       SysTrayX.Link.postSysTrayXMessage({ shutdown: "true" });
     }
 
+    const kdeIntegration = response["kdeIntegration"];
+    if (kdeIntegration) {
+      browser.storage.sync.set({
+        kdeIntegration: kdeIntegration,
+      });
+    }
+
     if (response["preferences"]) {
       //  Store the preferences from the app
       const defaultIconMime = response["preferences"].defaultIconMime;
@@ -279,6 +300,13 @@ SysTrayX.Link = {
         });
       }
 
+      const hideDefaultIcon = response["preferences"].hideDefaultIcon;
+      if (hideDefaultIcon) {
+        browser.storage.sync.set({
+          hideDefaultIcon: hideDefaultIcon,
+        });
+      }
+
       const iconMime = response["preferences"].iconMime;
       if (iconMime) {
         browser.storage.sync.set({
@@ -391,6 +419,10 @@ async function start() {
     );
   }
 
+  //  Hide the default icon
+  const hideDefaultIcon = await getHideDefaultIcon();
+  SysTrayX.hideDefaultIcon = hideDefaultIcon;
+
   //  Set platform
   SysTrayX.platformInfo = await browser.runtime
     .getPlatformInfo()
@@ -424,6 +456,11 @@ async function start() {
     browserInfo: SysTrayX.browserInfo,
   });
 
+  //  Reset KDE integration
+  browser.storage.sync.set({
+    kdeIntegration: true,
+  });
+
   //  Get addon version
   SysTrayX.version = browser.runtime.getManifest().version;
   console.log("Addon version: " + SysTrayX.version);
diff --git a/webext/js/defaults.js b/webext/js/defaults.js
index 0337b1e..c903605 100644
--- a/webext/js/defaults.js
+++ b/webext/js/defaults.js
@@ -146,6 +146,26 @@ async function getMinimizeOnClose() {
   );
 }
 
+//
+//  Get KDE integration, default icon hide
+//
+async function getHideDefaultIcon() {
+  function getHideDefaultIconPref(result) {
+    const hideDefaultIcon = result.hideDefaultIcon || "false";
+    return hideDefaultIcon === "true";
+  }
+
+  function onHideDefaultIconPrefError() {
+    return false;
+  }
+
+  const getState = browser.storage.sync.get("hideDefaultIcon");
+  return await getState.then(
+    getHideDefaultIconPref,
+    onHideDefaultIconPrefError
+  );
+}
+
 //  Check if the filters are for existing accounts
 function checkAccountFilters(filters) {
   let filtersChanged = false;
diff --git a/webext/options.html b/webext/options.html
index a85b41b..c30b6db 100644
--- a/webext/options.html
+++ b/webext/options.html
@@ -35,7 +35,7 @@
         <h3>Windows</h3>
         <table id="minimizeselect">
           <caption>
-            Minimize type
+            Minimize
           </caption>
           <tr id="minimizedefault">
             <td>
@@ -86,7 +86,8 @@
           </tr>
           <tr>
             <td>
-              <input type="radio" name="defaultIconType" value="1" /> Hide icon
+              <input type="radio" name="defaultIconType" value="1" />
+              Lookthrough icon
             </td>
           </tr>
           <tr>
@@ -123,6 +124,11 @@
           </tr>
         </table>
 
+        <div id="kdeintegration">
+          <input type="checkbox" name="hideDefaultIcon" value="" /> KDE
+          integration (Hide)<br />
+        </div>
+
         <table id="iconselect">
           <caption>
             Unread mail icon
diff --git a/webext/options.js b/webext/options.js
index f978a62..f49be8f 100644
--- a/webext/options.js
+++ b/webext/options.js
@@ -109,6 +109,16 @@ SysTrayX.SaveOptions = {
       defaultIcon: defaultIconBase64,
     });
 
+    //
+    //  Save hide default icon state
+    //
+    let hideDefaultIcon = document.querySelector(
+      'input[name="hideDefaultIcon"]'
+    ).checked;
+    browser.storage.sync.set({
+      hideDefaultIcon: `${hideDefaultIcon}`,
+    });
+
     //
     // Save icon preferences
     //
@@ -234,6 +244,18 @@ SysTrayX.RestoreOptions = {
       SysTrayX.RestoreOptions.onDefaultIconError
     );
 
+    //
+    //  Restore hide default icon
+    //
+    const getHideDefaultIcon = browser.storage.sync.get([
+      "kdeIntegration",
+      "hideDefaultIcon",
+    ]);
+    getHideDefaultIcon.then(
+      SysTrayX.RestoreOptions.setHideDefaultIcon,
+      SysTrayX.RestoreOptions.onHideDefaultIconError
+    );
+
     //
     //  Restore icon type
     //
@@ -452,6 +474,26 @@ SysTrayX.RestoreOptions = {
     console.log(`Default icon Error: ${error}`);
   },
 
+  //
+  //  Restore hide default icon callbacks
+  //
+  setHideDefaultIcon: function (result) {
+    const kdeIntegration = result.kdeIntegration || "true";
+    const hideDefaultIcon = result.hideDefaultIcon || "false";
+
+    const checkbox = document.querySelector(`input[name="hideDefaultIcon"]`);
+
+    if (kdeIntegration === "false") {
+      checkbox.parentNode.setAttribute("style", "display: none;");
+    }
+
+    checkbox.checked = hideDefaultIcon === "true";
+  },
+
+  onHideDefaultIconError: function (error) {
+    console.log(`hideDefaultIcon Error: ${error}`);
+  },
+
   //
   //  Restore icon
   //
@@ -677,6 +719,11 @@ SysTrayX.StorageChanged = {
           defaultIconType: changes[item].newValue,
         });
       }
+      if (item === "hideDefaultIcon") {
+        SysTrayX.RestoreOptions.setHideDefaultIcon({
+          hideDefaultIcon: changes[item].newValue,
+        });
+      }
       if (item === "showNumber") {
         SysTrayX.RestoreOptions.setShowNumber({
           showNumber: changes[item].newValue,