diff --git a/README.md b/README.md
index be700bc50..9ae5d7c54 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,13 @@ The current version of the snippet is version 8, the version is identified by th
     // onInit: null, // Once the application insights instance has loaded and initialized this callback function will be called with 1 argument -- the sdk instance (DO NOT ADD anything to the sdk.queue -- As they won't get called)
     // sri: false, // Custom optional value to specify whether fetching the snippet from integrity file and do integrity check 
     cfg: { // Application Insights Configuration
-        connectionString: "YOUR_CONNECTION_STRING"
+        connectionString: "YOUR_CONNECTION_STRING",
+        extensionConfig: { 
+          ApplicationInsightsAnalytics: {
+            autoExceptionInstrumented: true  // Workaround for older SDK versions to prevent duplicate hooking of window.onerror. 
+                                             // Fixed in v3.3.5; recommended for versions prior to this.
+          }
+        },
     }
 });
 </script>
diff --git a/extensions/applicationinsights-analytics-js/src/JavaScriptSDK/AnalyticsPlugin.ts b/extensions/applicationinsights-analytics-js/src/JavaScriptSDK/AnalyticsPlugin.ts
index fc32ed1b6..b51873cac 100644
--- a/extensions/applicationinsights-analytics-js/src/JavaScriptSDK/AnalyticsPlugin.ts
+++ b/extensions/applicationinsights-analytics-js/src/JavaScriptSDK/AnalyticsPlugin.ts
@@ -700,7 +700,7 @@ export class AnalyticsPlugin extends BaseTelemetryPlugin implements IAppInsights
                 _self._addHook(onConfigChange(_extConfig, () => {
                     _disableExceptionTracking = _extConfig.disableExceptionTracking;
 
-                    if (!_disableExceptionTracking && !_autoExceptionInstrumented && !_extConfig.autoExceptionInstrumented) {
+                    if (!_disableExceptionTracking && !_autoExceptionInstrumented && !_extConfig.autoExceptionInstrumented && !_self.core.config["autoExceptionInstrumented"]) {
                         // We want to enable exception auto collection and it has not been done so yet
                         _addHook(InstrumentEvent(_window, "onerror", {
                             ns: _evtNamespace,