diff --git a/G-Earth/src/main/java/gearth/extensions/InternalExtensionBuilder.java b/G-Earth/src/main/java/gearth/extensions/InternalExtensionBuilder.java
index e1631b7..b7fe5d4 100644
--- a/G-Earth/src/main/java/gearth/extensions/InternalExtensionBuilder.java
+++ b/G-Earth/src/main/java/gearth/extensions/InternalExtensionBuilder.java
@@ -5,6 +5,7 @@ import gearth.misc.packet_info.PacketInfoManager;
 import gearth.protocol.HMessage;
 import gearth.protocol.HPacket;
 import gearth.protocol.connection.HClient;
+import gearth.services.extensionhandler.extensions.ExtensionType;
 import gearth.services.extensionhandler.extensions.GEarthExtension;
 
 // wraps internal GEarthExtension class to IExtension interface
@@ -136,4 +137,9 @@ public class InternalExtensionBuilder extends GEarthExtension {
         // no need in java ext
     }
 
+    @Override
+    public ExtensionType extensionType() {
+        return ExtensionType.INTERNAL;
+    }
+
 }
diff --git a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/ExtensionType.java b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/ExtensionType.java
new file mode 100644
index 0000000..00d0358
--- /dev/null
+++ b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/ExtensionType.java
@@ -0,0 +1,6 @@
+package gearth.services.extensionhandler.extensions;
+
+public enum ExtensionType {
+    INTERNAL,
+    EXTERNAL
+}
diff --git a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/GEarthExtension.java b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/GEarthExtension.java
index adaf8c9..a4dc25a 100644
--- a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/GEarthExtension.java
+++ b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/GEarthExtension.java
@@ -123,4 +123,7 @@ public abstract class GEarthExtension {
     }
     // ----------------------------------------------------------------------------------------
 
+
+
+    public abstract ExtensionType extensionType();
 }
diff --git a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/network/NetworkExtension.java b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/network/NetworkExtension.java
index 723f822..bf0f3fd 100644
--- a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/network/NetworkExtension.java
+++ b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/network/NetworkExtension.java
@@ -3,6 +3,7 @@ package gearth.services.extensionhandler.extensions.implementations.network;
 import gearth.misc.packet_info.PacketInfoManager;
 import gearth.protocol.HMessage;
 import gearth.protocol.connection.HClient;
+import gearth.services.extensionhandler.extensions.ExtensionType;
 import gearth.services.extensionhandler.extensions.GEarthExtension;
 import gearth.protocol.HPacket;
 
@@ -239,4 +240,9 @@ public class NetworkExtension extends GEarthExtension {
         packet.appendLongString(packetFromString.stringify());
         sendMessage(packet);
     }
+
+    @Override
+    public ExtensionType extensionType() {
+        return ExtensionType.EXTERNAL;
+    }
 }
\ No newline at end of file
diff --git a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/simple/ExampleExtension.java b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/simple/ExampleExtension.java
index c580eeb..742cc4f 100644
--- a/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/simple/ExampleExtension.java
+++ b/G-Earth/src/main/java/gearth/services/extensionhandler/extensions/implementations/simple/ExampleExtension.java
@@ -4,6 +4,7 @@ import gearth.misc.packet_info.PacketInfoManager;
 import gearth.protocol.HMessage;
 import gearth.protocol.HPacket;
 import gearth.protocol.connection.HClient;
+import gearth.services.extensionhandler.extensions.ExtensionType;
 import gearth.services.extensionhandler.extensions.GEarthExtension;
 
 public class ExampleExtension extends GEarthExtension {
@@ -122,4 +123,9 @@ public class ExampleExtension extends GEarthExtension {
     public void stringToPacketResponse(HPacket packet) {
 
     }
+
+    @Override
+    public ExtensionType extensionType() {
+        return ExtensionType.INTERNAL;
+    }
 }
diff --git a/G-Earth/src/main/java/gearth/ui/extensions/ExtensionItemContainer.java b/G-Earth/src/main/java/gearth/ui/extensions/ExtensionItemContainer.java
index 43b1158..12729b5 100644
--- a/G-Earth/src/main/java/gearth/ui/extensions/ExtensionItemContainer.java
+++ b/G-Earth/src/main/java/gearth/ui/extensions/ExtensionItemContainer.java
@@ -1,5 +1,6 @@
 package gearth.ui.extensions;
 
+import gearth.services.extensionhandler.extensions.ExtensionType;
 import gearth.services.extensionhandler.extensions.GEarthExtension;
 import javafx.application.Platform;
 import javafx.event.EventHandler;
@@ -142,6 +143,11 @@ public class ExtensionItemContainer extends GridPane {
 
         parent.getChildren().add(this);
 
+        if (item.extensionType() == ExtensionType.INTERNAL) {
+            setBackground(new Background(new BackgroundFill(Paint.valueOf("F0FFFF"), CornerRadii.EMPTY, Insets.EMPTY)));
+        }
+
+
         initExtension();
     }