Make Every Class Internal

Core/FirstUpdateHook.cs

@@ -4,7 +4,7 @@ using UnityEngine;
 namespace ADOFAIRenderer.Core
 {
     [DefaultExecutionOrder(int.MinValue)]
-    public class FirstUpdateHook : MonoBehaviour
+    internal class FirstUpdateHook : MonoBehaviour
     {
         private bool _checkedFFmpeg;
         private bool _checkedNvidiaDriver;