diff --git a/extensions/cornerstone/src/init.js b/extensions/cornerstone/src/init.js
index b571abc77..f9c72993a 100644
--- a/extensions/cornerstone/src/init.js
+++ b/extensions/cornerstone/src/init.js
@@ -48,16 +48,18 @@ export default async function init({
   await cs3DInit();
 
   // For debugging e2e tests that are failing on CI
-  //cornerstone.setUseCPURendering(true);
+  cornerstone.setUseCPURendering(Boolean(appConfig.useCPURendering));
 
   // For debugging large datasets
-  //cornerstone.cache.setMaxCacheSize(3000000000);
+  const MAX_CACHE_SIZE_1GB = 1073741824;
+  const maxCacheSize = appConfig.maxCacheSize;
+  cornerstone.cache.setMaxCacheSize(
+    maxCacheSize ? maxCacheSize : MAX_CACHE_SIZE_1GB
+  );
 
   initCornerstoneTools();
 
-  // Don't use cursors in viewports
-  // Todo: this should come from extension/app configuration
-  Settings.getRuntimeSettings().set('useCursors', false);
+  Settings.getRuntimeSettings().set('useCursors', Boolean(appConfig.useCursors));
 
   const {
     UserAuthenticationService,