chore: Start making use of Mozilla's linter, p=#12656

.github/workflows/pr-test.yml

@@ -28,13 +28,29 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      - name: Restore Surfer engine cache
+        id: surfer-engine-cache
+        uses: actions/cache@v4
+        with:
+          path: .surfer/engine/*.tar
+          key: surfer-engine-${{ hashFiles('surfer.json') }}
+
+      - name: Setup Git
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
       - name: Download Firefox and dependencies
-        env:
-          ZEN_DOWNLOAD_DONT_INIT_GIT: "1"
         run: npm run download
 
-      - name: Run linting
-        run: npm run lint
+      - name: Run Bootstrap
+        run: npm run bootstrap
+
+      - name: Add .hgignore file to the engine dir
+        run: touch engine/.hgignore
 
       - name: Import patches
         run: npm run import
+
+      - name: Run linting
+        run: npm run lint