diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index 6593230d9..d8e103896 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -20,14 +20,11 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v7
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v6
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v7
+      - name: Setup pnpm and Node.js
+        uses: pnpm/setup@v2
         with:
-          node-version: "26"
-          cache: pnpm
+          cache: true
+          install: false
 
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9e27e8464..118954095 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -37,14 +37,11 @@ jobs:
         with:
           ref: ${{ github.event.inputs.tag }}
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v6
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v7
+      - name: Setup pnpm and Node.js
+        uses: pnpm/setup@v2
         with:
-          node-version: "26"
-          cache: pnpm
+          cache: true
+          install: false
 
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile
diff --git a/.github/workflows/submit.yml b/.github/workflows/submit.yml
index 09b0e6d83..c0286dbaf 100644
--- a/.github/workflows/submit.yml
+++ b/.github/workflows/submit.yml
@@ -29,14 +29,11 @@ jobs:
         with:
           ref: ${{ inputs.tag }}
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v6
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v7
+      - name: Setup pnpm and Node.js
+        uses: pnpm/setup@v2
         with:
-          node-version: "26"
-          cache: pnpm
+          cache: true
+          install: false
 
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile
diff --git a/SOURCE_CODE_REVIEW.md b/SOURCE_CODE_REVIEW.md
index b117d499b..658804868 100644
--- a/SOURCE_CODE_REVIEW.md
+++ b/SOURCE_CODE_REVIEW.md
@@ -2,16 +2,16 @@
 
 ## Build Environment
 
-- **Node.js**: >= 22.22.0
-- **pnpm**: 11.13.1 (auto-installed via corepack)
+- **Node.js**: ^26.5.1
+- **pnpm**: 11.20.0 (pinned by the `packageManager` field in `package.json`)
 
 ## Build Steps
 
 ```bash
-# 1. Enable corepack (ships with Node.js) to auto-install the correct pnpm version
-corepack enable
+# 1. Install pnpm if it is not already available
+npx get-pnpm
 
-# 2. Install dependencies
+# 2. Install dependencies using the version pinned in package.json
 pnpm install --frozen-lockfile
 
 # 3. Build the Firefox extension