diff --git a/docker-compose.yml b/docker-compose.yml
index 4081d9c..3d376c8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   orchestrator:
     build:
@@ -35,7 +33,7 @@ services:
       # - BROWSERFORGE_SEED=...
     depends_on:
       - redis
-    shm_size: 2gb
+
     volumes:
       - .:/app
       - /dev/shm:/dev/shm
diff --git a/implementation_plan.md b/implementation_plan.md
index 0ba0aa9..205215b 100644
--- a/implementation_plan.md
+++ b/implementation_plan.md
@@ -15,6 +15,8 @@ Transition the system from a functional prototype to a scalable, production-read
     -   Scaled `camoufox-pool` to 5 replicas.
     -   Scaled `curl-pool` to 20 replicas.
     -   Added `prometheus` and `grafana` services.
+    -   Cleaned up `version` and `shm_size` fields.
+-   **Dockerfile**: Updated `src/browser/Dockerfile` to use `mcr.microsoft.com/playwright/python:v1.40.0-jammy`.
 
 ### Core Tier (Orchestration & Monitoring)
 -   **MetricsCollector** (`src/core/monitoring.py`):
diff --git a/src/browser/Dockerfile b/src/browser/Dockerfile
index b0384b8..94196c3 100644
--- a/src/browser/Dockerfile
+++ b/src/browser/Dockerfile
@@ -1,46 +1,17 @@
-FROM python:3.11-slim
+FROM mcr.microsoft.com/playwright/python:v1.40.0-jammy
 
 WORKDIR /app
 
-# Install system dependencies for Playwright/Camoufox
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl \
-    git \
-    # WebKit/Chromium dependencies for Playwright
-    libwoff1 \
-    libopus0 \
-    libwebp6 \
-    libwebpdemux2 \
-    libenchant-2-2 \
-    libgudev-1.0-0 \
-    libsecret-1-0 \
-    libhyphen0 \
-    libgdk-pixbuf2.0-0 \
-    libegl1 \
-    libnotify4 \
-    libxslt1.1 \
-    libevent-2.1-7 \
-    libgles2 \
-    libvpx7 \
-    libxcomposite1 \
-    libatk1.0-0 \
-    libatk-bridge2.0-0 \
-    libepoxy0 \
-    libgtk-3-0 \
-    libharfbuzz-icu0 \
-    libgstreamer-gl1.0-0 \
-    libgstreamer-plugins-bad1.0-0 \
-    gstreamer1.0-plugins-good \
-    gstreamer1.0-libav \
-    && rm -rf /var/lib/apt/lists/*
+# Base image already includes all dependencies + browsers.
+# Just install Python requirements.
 
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Install Playwright browsers (Specifically Chromium/Firefox as needed)
-# Camoufox typically uses its own patched browser or relies on Playwright's firefox.
-RUN playwright install chromium firefox
-
+# Copy application source
 COPY . .
 
+# Set PYTHONPATH to root so 'src' module is resolvable
+ENV PYTHONPATH=/app
+
 CMD ["python", "-m", "src.browser.manager"]
diff --git a/walkthrough.md b/walkthrough.md
index 8b0b9e8..410b130 100644
--- a/walkthrough.md
+++ b/walkthrough.md
@@ -105,6 +105,8 @@ tests/unit/test_session_core.py .. [100%]
 
 ### 2. Implementation Results
 - **Infrastructure**: Updated `docker-compose.yml` with scaling strategies and monitoring stack.
+    - switched `camoufox-pool` base image to Microsoft Playwright Jammy for stability.
+    - Removed `shm_size` conflict and legacy version tag.
 - **Worker**: Implemented `src/orchestrator/worker.py` for continuous task processing.
 - **Monitoring**: Implemented `src/core/monitoring.py` exposing metrics on port 8000.
 - **Documentation**: Updated `README.md` with production operations guide.