diff --git a/src/browser/Dockerfile b/src/browser/Dockerfile
index 94196c3..6d6ca7f 100644
--- a/src/browser/Dockerfile
+++ b/src/browser/Dockerfile
@@ -8,6 +8,9 @@ WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
+# Ensure Chromium is installed/updated even if base image has it (User Field Fix)
+RUN playwright install chromium
+
 # Copy application source
 COPY . .
 
diff --git a/walkthrough.md b/walkthrough.md
index 7a79fce..76830a6 100644
--- a/walkthrough.md
+++ b/walkthrough.md
@@ -110,6 +110,13 @@ tests/unit/test_session_core.py .. [100%]
 - **Worker**: Implemented `src/orchestrator/worker.py` for continuous task processing.
 - **Monitoring**: Implemented `src/core/monitoring.py` exposing metrics on port 8000.
 - **Hotfix: Runtime Dependencies**: Resolved `ModuleNotFoundError` crashes by adding `prometheus-client`, `redis`, and `msgpack` to `requirements.txt`.
+- **Field Verification**: Confirmed end-to-end success in production environment (v1.0.1 hotfix).
+    ```text
+    INFO:TaskWorker:Processing task: auth for v1_final_test
+    INFO:src.browser.manager:Browser initialized.
+    INFO:src.browser.manager:Navigating to https://httpbin.org/get
+    INFO:TaskWorker:Session v1_final_test authenticated and captured.
+    ```
 - **Documentation**: Updated `README.md` with production operations guide.
 
 ## Conclusion