diff --git a/app/SysTray-X/SysTray-X-app/systrayxicon.cpp b/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
index 1d59353..4d0d337 100644
--- a/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
+++ b/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
@@ -37,6 +37,8 @@ SysTrayXIcon::SysTrayXIcon( SysTrayXLink* link, Preferences* pref, QObject* pare
     setNumberAlignment( m_pref->getNumberAlignment() );
     m_number_margins = m_pref->getNumberMargins();
 
+    setToolTip( tr( "SysTray-X: Thunderbird add-on companion app" ) );
+
     connect( this, &QSystemTrayIcon::activated, this, &SysTrayXIcon::slotIconActivated );
 }
 
diff --git a/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp b/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
index f1894d5..9582001 100644
--- a/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
+++ b/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
@@ -58,7 +58,10 @@ SysTrayXStatusNotifier::SysTrayXStatusNotifier( SysTrayXLink* link, Preferences*
         setIconByPixmap( QIcon( QPixmap( ":/files/icons/Thunderbird115.png") ) );
     }
 
-    setTitle("SysTray-X");
+    setTitle( "SysTray-X" );
+
+    setToolTipTitle( "SysTray-X" );
+    setToolTipSubTitle( tr( "Thunderbird add-on companion app" ) );
 
     setStatus( KStatusNotifierItem::ItemStatus::Passive );
     m_hide_default_icon = true;