diff --git a/app/SysTray-X/SysTray-X-app/SysTray-X.qrc b/app/SysTray-X/SysTray-X-app/SysTray-X.qrc
index b704796..6abe2c9 100644
--- a/app/SysTray-X/SysTray-X-app/SysTray-X.qrc
+++ b/app/SysTray-X/SysTray-X-app/SysTray-X.qrc
@@ -29,5 +29,6 @@
         <file>languages/SysTray-X.zh-CN.qm</file>
         <file>languages/SysTray-X.zh-TW.qm</file>
         <file>files/icons/blank-icon-dark.png</file>
+        <file>files/icons/Thunderbird115.png</file>
     </qresource>
 </RCC>
diff --git a/app/SysTray-X/SysTray-X-app/files/icons/Thunderbird115.png b/app/SysTray-X/SysTray-X-app/files/icons/Thunderbird115.png
new file mode 100644
index 0000000..ccc26b2
Binary files /dev/null and b/app/SysTray-X/SysTray-X-app/files/icons/Thunderbird115.png differ
diff --git a/app/SysTray-X/SysTray-X-app/systrayxicon.cpp b/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
index 7bbe949..1d59353 100644
--- a/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
+++ b/app/SysTray-X/SysTray-X-app/systrayxicon.cpp
@@ -20,7 +20,7 @@
  *	Constructor
  */
 SysTrayXIcon::SysTrayXIcon( SysTrayXLink* link, Preferences* pref, QObject* parent )
-    : QSystemTrayIcon( QIcon( ":/files/icons/Thunderbird.png" ), parent )
+    : QSystemTrayIcon( parent )
 {
     /*
      *  Initialize
@@ -343,7 +343,16 @@ void    SysTrayXIcon::renderIcon()
 
             case Preferences::PREF_TB_ICON:
             {
-                pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                QString version = m_pref->getBrowserVersion();
+
+                if( version.section( '.', 0, 0 ).toInt() < 115 )
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                }
+                else
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird115.png" );
+                }
                 break;
             }
         }
@@ -354,7 +363,16 @@ void    SysTrayXIcon::renderIcon()
         {
             case Preferences::PREF_DEFAULT_ICON_DEFAULT:
             {
-                pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                QString version = m_pref->getBrowserVersion();
+
+                if( version.section( '.', 0, 0 ).toInt() < 115 )
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                }
+                else
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird115.png" );
+                }
                 break;
             }
 
diff --git a/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp b/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
index f27ee08..f1894d5 100644
--- a/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
+++ b/app/SysTray-X/SysTray-X-app/systrayxstatusnotifier.cpp
@@ -47,7 +47,17 @@ SysTrayXStatusNotifier::SysTrayXStatusNotifier( SysTrayXLink* link, Preferences*
      */
     setCategory( KStatusNotifierItem::ApplicationStatus );
 
-    setIconByPixmap( QIcon( QPixmap( ":/files/icons/Thunderbird.png") ) );
+    QString version = m_pref->getBrowserVersion();
+
+    if( version.section( '.', 0, 0 ).toInt() < 115 )
+    {
+        setIconByPixmap( QIcon( QPixmap( ":/files/icons/Thunderbird.png") ) );
+    }
+    else
+    {
+        setIconByPixmap( QIcon( QPixmap( ":/files/icons/Thunderbird115.png") ) );
+    }
+
     setTitle("SysTray-X");
 
     setStatus( KStatusNotifierItem::ItemStatus::Passive );
@@ -377,7 +387,16 @@ void    SysTrayXStatusNotifier::renderIcon()
 
             case Preferences::PREF_TB_ICON:
             {
-                pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                QString version = m_pref->getBrowserVersion();
+
+                if( version.section( '.', 0, 0 ).toInt() < 115 )
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                }
+                else
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird115.png" );
+                }
                 break;
             }
         }
@@ -388,7 +407,16 @@ void    SysTrayXStatusNotifier::renderIcon()
         {
             case Preferences::PREF_DEFAULT_ICON_DEFAULT:
             {
-                pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                QString version = m_pref->getBrowserVersion();
+
+                if( version.section( '.', 0, 0 ).toInt() < 115 )
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird.png" );
+                }
+                else
+                {
+                    pixmap = QPixmap( ":/files/icons/Thunderbird115.png" );
+                }
                 break;
             }
 
diff --git a/webext/icons/Thunderbird115.png b/webext/icons/Thunderbird115.png
new file mode 100644
index 0000000..ccc26b2
Binary files /dev/null and b/webext/icons/Thunderbird115.png differ
diff --git a/webext/js/defaults.js b/webext/js/defaults.js
index f2056e3..6bad602 100644
--- a/webext/js/defaults.js
+++ b/webext/js/defaults.js
@@ -124,8 +124,15 @@ async function getDefaultIcon() {
         );
 
     //  Convert image to storage param
+    var defaultIconPath;
+    if (SysTrayX.Info.browserInfo.majorVersion < 115) {
+      defaultIconPath = "icons/Thunderbird.png";
+    } else {
+      defaultIconPath = "icons/Thunderbird115.png";
+    }
+
     const { defaultIconMimeUrl, defaultIconBase64Url } = await toDataURL(
-      "icons/Thunderbird.png"
+      defaultIconPath
     ).then((dataUrl) => {
       const data = dataUrl.split(":").pop().split(",");
       return {
diff --git a/webext/options.js b/webext/options.js
index 6c2228b..d48f262 100644
--- a/webext/options.js
+++ b/webext/options.js
@@ -1182,6 +1182,13 @@ async function start() {
     document.getElementById("counttype").style.display = "none";
   }
 
+  // Set the right default icon
+  if (SysTrayX.Info.browserInfo.majorVersion < 115) {
+    document.getElementById("defaultCustomIconImage").setAttribute("src","icons/Thunderbird.png");
+  } else {
+    document.getElementById("defaultCustomIconImage").setAttribute("src","icons/Thunderbird115.png");
+  }
+
   if (SysTrayX.Info.platformInfo.os !== "linux") {
     document.getElementById("kdeintegration").style.display = "none";
   }