diff --git a/injected/entry-points/extension-mv3.js b/injected/entry-points/extension-mv3.js
index 29f9f384b6..4d06d6e693 100644
--- a/injected/entry-points/extension-mv3.js
+++ b/injected/entry-points/extension-mv3.js
@@ -3,6 +3,7 @@
  */
 import { load, init, update } from '../src/content-scope-features.js';
 import { computeLimitedSiteObject } from '../src/utils.js';
+import { getSharedMessagingTransport } from '../src/sendmessage-transport.js';
 
 const secret = (crypto.getRandomValues(new Uint32Array(1))[0] / 2 ** 32).toString().replace('0.', '');
 
@@ -34,6 +35,16 @@ window.addEventListener(secret, ({ detail: encodedMessage }) => {
                 init(message.argumentsObject);
             }
             break;
+        default:
+            // Messages with messageType are subscription responses from the extension.
+            // Route them to the shared transport so all subscribed features receive them.
+            if (message.messageType) {
+                const transport = getSharedMessagingTransport();
+                if (transport?.onResponse) {
+                    transport.onResponse(message);
+                }
+            }
+            break;
     }
 });
 
diff --git a/injected/src/features.js b/injected/src/features.js
index 9075035dbc..e4a3489749 100644
--- a/injected/src/features.js
+++ b/injected/src/features.js
@@ -79,7 +79,7 @@ export const platformSupport = {
         'pageContext',
         'duckAiDataClearing',
     ],
-    firefox: ['cookie', ...baseFeatures, 'clickToLoad'],
+    firefox: ['cookie', ...baseFeatures, 'clickToLoad', 'webInterferenceDetection', 'breakageReporting'],
     chrome: ['cookie', ...baseFeatures, 'clickToLoad', 'webInterferenceDetection', 'breakageReporting'],
     'chrome-mv3': ['cookie', ...baseFeatures, 'clickToLoad', 'webInterferenceDetection', 'breakageReporting'],
     integration: [...baseFeatures, ...otherFeatures],
diff --git a/injected/src/features/breakage-reporting.js b/injected/src/features/breakage-reporting.js
index a7bed4042f..7bdf3440f6 100644
--- a/injected/src/features/breakage-reporting.js
+++ b/injected/src/features/breakage-reporting.js
@@ -29,6 +29,7 @@ export default class BreakageReporting extends ContentFeature {
             }
 
             // Only run detectors if explicitly configured
+            // Fetch interferenceTypes from webInterferenceDetection feature settings
             const detectorSettings = this.getFeatureSetting('interferenceTypes', 'webInterferenceDetection');
             if (detectorSettings) {
                 result.detectorData = {
diff --git a/injected/src/sendmessage-transport.js b/injected/src/sendmessage-transport.js
index f9f5f6d45d..bb7339f301 100644
--- a/injected/src/sendmessage-transport.js
+++ b/injected/src/sendmessage-transport.js
@@ -6,12 +6,29 @@ import { TestTransportConfig } from '../../messaging/index.js';
  * @typedef {import('@duckduckgo/messaging').MessagingTransport} MessagingTransport
  */
 
+/**
+ * Singleton transport shared across all features. Without this, each feature would
+ * have its own transport/queue and wouldn't receive messages meant for other features.
+ * @type {SendMessageMessagingTransport | null}
+ */
+let sharedTransport = null;
+
 /**
  * @deprecated - A temporary constructor for the extension to make the messaging config
  */
 export function extensionConstructMessagingConfig() {
-    const messagingTransport = new SendMessageMessagingTransport();
-    return new TestTransportConfig(messagingTransport);
+    if (!sharedTransport) {
+        sharedTransport = new SendMessageMessagingTransport();
+    }
+    return new TestTransportConfig(sharedTransport);
+}
+
+/**
+ * Used by entry-points to route incoming extension messages to onResponse().
+ * @returns {SendMessageMessagingTransport | null}
+ */
+export function getSharedMessagingTransport() {
+    return sharedTransport;
 }
 
 /**