diff --git a/app/src/main/res/raw/initial_experiments.json b/app/src/main/res/raw/initial_experiments.json
index ba977a8f5..f624e7eba 100644
--- a/app/src/main/res/raw/initial_experiments.json
+++ b/app/src/main/res/raw/initial_experiments.json
@@ -282,103 +282,6 @@
       "localizations": null,
       "locales": null
     },
-    {
-      "schemaVersion": "1.12.0",
-      "slug": "on-boarding-challenge-the-default",
-      "id": "on-boarding-challenge-the-default",
-      "arguments": {},
-      "application": "org.mozilla.firefox",
-      "appName": "fenix",
-      "appId": "org.mozilla.firefox",
-      "channel": "release",
-      "userFacingName": "On-boarding Challenge the Default",
-      "userFacingDescription": "Testing copy and images in the first run onboarding that is consistent with marketing messaging.",
-      "isEnrollmentPaused": true,
-      "isRollout": false,
-      "bucketConfig": {
-        "randomizationUnit": "nimbus_id",
-        "namespace": "fenix-juno-onboarding-release-3",
-        "start": 0,
-        "count": 10000,
-        "total": 10000
-      },
-      "featureIds": [
-        "juno-onboarding"
-      ],
-      "probeSets": [],
-      "outcomes": [
-        {
-          "slug": "default-browser",
-          "priority": "primary"
-        }
-      ],
-      "branches": [
-        {
-          "slug": "control",
-          "ratio": 1,
-          "feature": {
-            "featureId": "this-is-included-for-mobile-pre-96-support",
-            "enabled": false,
-            "value": {}
-          },
-          "features": [
-            {
-              "featureId": "juno-onboarding",
-              "enabled": true,
-              "value": {
-                "enabled": true
-              }
-            }
-          ]
-        },
-        {
-          "slug": "treatment-a",
-          "ratio": 1,
-          "feature": {
-            "featureId": "this-is-included-for-mobile-pre-96-support",
-            "enabled": false,
-            "value": {}
-          },
-          "features": [
-            {
-              "featureId": "juno-onboarding",
-              "enabled": true,
-              "value": {
-                "enabled": true,
-                "cards": {
-                  "default-browser": {
-                    "title": "Du entscheidest, was Standard ist",
-                    "body": "Nimm nicht das Erstbeste, sondern das Beste für dich: Firefox schützt deine Privatsphäre.\n\nLies unseren Datenschutzhinweis.",
-                    "link-text": "Datenschutzhinweis",
-                    "image-res": "onboarding_ctd_default_browser"
-                  },
-                  "sync-sign-in": {
-                    "title": "Alles ist dort, wo du es brauchst",
-                    "body": "Wenn du willst, bringt Firefox deine Tabs und Passwörter auf all deine Geräte.",
-                    "image-res": "onboarding_ctd_sync"
-                  },
-                  "notification-permission": {
-                    "title": "Du bestimmst, was Firefox kann",
-                    "body": "Benachrichtigungen helfen dabei, Downloads zu managen und Tabs zwischen Geräten zu senden.",
-                    "image-res": "onboarding_ctd_notification"
-                  }
-                }
-              }
-            }
-          ]
-        }
-      ],
-      "targeting": "((is_already_enrolled) || ((isFirstRun == 'true') && (app_version|versionCompare('115.!') >= 0) && (language in ['de']) && (region in ['DE'])))",
-      "startDate": "2023-06-21",
-      "enrollmentEndDate": "2023-08-09",
-      "endDate": null,
-      "proposedDuration": 30,
-      "proposedEnrollment": 14,
-      "referenceBranch": "control",
-      "featureValidationOptOut": false,
-      "localizations": null,
-      "locales": null
-    },
     {
       "schemaVersion": "1.12.0",
       "slug": "release-android-onboarding-redesign-treatment-a-rollout",