diff --git a/package-lock.json b/package-lock.json
index ea4ce2f6..2896b21c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@splitsoftware/splitio-commons",
-  "version": "2.4.1",
+  "version": "2.4.2-rc.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@splitsoftware/splitio-commons",
-      "version": "2.4.1",
+      "version": "2.4.2-rc.1",
       "license": "Apache-2.0",
       "dependencies": {
         "@types/ioredis": "^4.28.0",
diff --git a/package.json b/package.json
index 27b15da2..9bc1ac29 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@splitsoftware/splitio-commons",
-  "version": "2.4.1",
+  "version": "2.4.2-rc.1",
   "description": "Split JavaScript SDK common components",
   "main": "cjs/index.js",
   "module": "esm/index.js",
diff --git a/src/sdkClient/sdkClient.ts b/src/sdkClient/sdkClient.ts
index cc44c9f7..7417a9ab 100644
--- a/src/sdkClient/sdkClient.ts
+++ b/src/sdkClient/sdkClient.ts
@@ -48,6 +48,7 @@ export function sdkClientFactory(params: ISdkFactoryContext, isSharedClient?: bo
 
     // Sdk destroy
     {
+      __ctx: params,
       flush() {
         // @TODO define cooldown time
         return __cooldown(__flush, COOLDOWN_TIME_IN_MILLIS);
diff --git a/src/sdkFactory/index.ts b/src/sdkFactory/index.ts
index bf807425..0dabfc06 100644
--- a/src/sdkFactory/index.ts
+++ b/src/sdkFactory/index.ts
@@ -107,8 +107,7 @@ export function sdkFactory(params: ISdkFactoryParams): SplitIO.ISDK | SplitIO.IA
 
   log.info(NEW_FACTORY);
 
-  // @ts-ignore
-  return objectAssign({
+  const factory = objectAssign({
     // Split evaluation and event tracking engine
     client: clientMethod,
 
@@ -126,6 +125,17 @@ export function sdkFactory(params: ISdkFactoryParams): SplitIO.ISDK | SplitIO.IA
     destroy() {
       hasInit = false;
       return Promise.all(Object.keys(clients).map(key => clients[key].destroy())).then(() => { });
-    }
+    },
+
+    __ctx: ctx
   }, extraProps && extraProps(ctx), lazyInit ? { init } : init());
+
+  // append factory to global
+  if (typeof window === 'object') { // @ts-ignore
+    // eslint-disable-next-line no-undef
+    (window.__HARNESS_FME__ = window.__HARNESS_FME__ || []).push(factory);
+  }
+
+  // @ts-ignore
+  return factory;
 }
diff --git a/src/trackers/impressionsTracker.ts b/src/trackers/impressionsTracker.ts
index 0d64a8ed..cc29c2d0 100644
--- a/src/trackers/impressionsTracker.ts
+++ b/src/trackers/impressionsTracker.ts
@@ -20,7 +20,7 @@ export function impressionsTrackerFactory(
   telemetryCache?: ITelemetryCacheSync | ITelemetryCacheAsync,
 ): IImpressionsTracker {
 
-  const { log, impressionListener, runtime: { ip, hostname }, version } = settings;
+  const { log, runtime: { ip, hostname }, version } = settings;
 
   return {
     track(impressions: ImpressionDecorated[], attributes?: SplitIO.Attributes) {
@@ -56,7 +56,7 @@ export function impressionsTrackerFactory(
       }
 
       // @TODO next block might be handled by the integration manager. In that case, the metadata object doesn't need to be passed in the constructor
-      if (impressionListener || integrationsManager) {
+      if (settings.impressionListener || integrationsManager) {
         for (let i = 0; i < impressionsLength; i++) {
           const impressionData: SplitIO.ImpressionData = {
             // copy of impression, to avoid unexpected behavior if modified by integrations or impressionListener
@@ -74,7 +74,7 @@ export function impressionsTrackerFactory(
               if (integrationsManager) integrationsManager.handleImpression(impressionData);
 
               try { // @ts-ignore. An exception on the listeners should not break the SDK.
-                if (impressionListener) impressionListener.logImpression(impressionData);
+                if (settings.impressionListener) settings.impressionListener.logImpression(impressionData);
               } catch (err) {
                 log.error(ERROR_IMPRESSIONS_LISTENER, [err]);
               }