diff --git a/.github/workflows/browser-benchmarks.yml b/.github/workflows/browser-benchmarks.yml
new file mode 100644
index 0000000..9932f4a
--- /dev/null
+++ b/.github/workflows/browser-benchmarks.yml
@@ -0,0 +1,152 @@
+name: Browser Benchmark
+
+on:
+  pull_request:
+    paths:
+      - 'src/browser/**'
+      - 'src/util/**'
+      - 'src/run.ts'
+      - 'src/merge-results.ts'
+      - 'package.json'
+  workflow_dispatch:
+    inputs:
+      iterations:
+        description: 'Iterations per provider'
+        required: false
+        default: '10'
+
+concurrency:
+  group: browser-benchmarks
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  bench:
+    name: Bench ${{ matrix.provider }}
+    runs-on: namespace-profile-default
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        provider:
+          - browserbase
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: 'npm'
+      - run: npm ci
+      - name: Clear stale results from checkout
+        run: rm -rf results/browser/
+      - name: Run browser benchmark
+        env:
+          BROWSERBASE_API_KEY: ${{ secrets.BROWSERBASE_API_KEY }}
+          BROWSERBASE_PROJECT_ID: ${{ secrets.BROWSERBASE_PROJECT_ID }}
+        run: |
+          npm run bench -- \
+            --mode browser \
+            --provider ${{ matrix.provider }} \
+            --iterations ${{ github.event.inputs.iterations || '10' }}
+      - name: Upload results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: browser-results-${{ matrix.provider }}
+          path: results/browser/
+          if-no-files-found: ignore
+          retention-days: 7
+
+  collect:
+    name: Collect Results
+    runs-on: namespace-profile-default
+    needs: bench
+    if: always()
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: 'npm'
+      - run: npm ci
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts/
+          pattern: browser-results-*
+      - name: Merge results
+        run: npx tsx src/merge-results.ts --input artifacts --mode browser
+      - name: Post results to PR
+        if: github.event_name == 'pull_request'
+        continue-on-error: true
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const path = require('path');
+
+            const runUrl = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+            const latestPath = path.join('results', 'browser', 'latest.json');
+
+            let body = '## Browser Benchmark Results\n\n';
+
+            if (!fs.existsSync(latestPath)) {
+              body += '> No browser benchmark results were generated.\n\n';
+            } else {
+              const data = JSON.parse(fs.readFileSync(latestPath, 'utf-8'));
+              const results = data.results
+                .filter(r => !r.skipped)
+                .sort((a, b) => (b.compositeScore || 0) - (a.compositeScore || 0));
+
+              if (results.length === 0) {
+                body += '> No browser benchmark results were generated.\n\n';
+              } else {
+                body += '| # | Provider | Score | Create | Connect | Navigate | Release | Total | Status |\n';
+                body += '|---|----------|-------|--------|---------|----------|---------|-------|--------|\n';
+
+                results.forEach((r, i) => {
+                  const name = r.provider.charAt(0).toUpperCase() + r.provider.slice(1);
+                  const score = r.compositeScore !== undefined ? r.compositeScore.toFixed(1) : '--';
+                  const create = (r.summary.createMs.median / 1000).toFixed(2) + 's';
+                  const connect = (r.summary.connectMs.median / 1000).toFixed(2) + 's';
+                  const navigate = (r.summary.navigateMs.median / 1000).toFixed(2) + 's';
+                  const release = (r.summary.releaseMs.median / 1000).toFixed(2) + 's';
+                  const total = (r.summary.totalMs.median / 1000).toFixed(2) + 's';
+                  const ok = r.iterations.filter(it => !it.error).length;
+                  const count = r.iterations.length;
+                  body += `| ${i + 1} | ${name} | ${score} | ${create} | ${connect} | ${navigate} | ${release} | ${total} | ${ok}/${count} |\n`;
+                });
+
+                body += '\n';
+              }
+            }
+
+            body += `---\n*[View full run](${runUrl})*`;
+
+            const marker = '## Browser Benchmark Results';
+            const { data: comments } = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+            });
+
+            const existing = comments.find(c => c.body.startsWith(marker));
+
+            if (existing) {
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: existing.id,
+                body,
+              });
+            } else {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body,
+              });
+            }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ece003f..744d0e5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -75,10 +75,10 @@ cp env.example .env
 ### Running Tests Locally
 
 ```bash
-# Run all three test modes (sequential → staggered → burst)
+# Run all three sandbox test modes (sequential → staggered → burst)
 npm run bench
 
-# Run individual test modes
+# Run individual sandbox test modes
 npm run bench -- --mode sequential --iterations 10
 npm run bench -- --mode staggered --concurrency 10 --stagger-delay 200
 npm run bench -- --mode burst --concurrency 10
@@ -88,6 +88,15 @@ npm run bench -- --provider e2b
 
 # Combine flags
 npm run bench -- --provider e2b --mode sequential --iterations 5
+
+# Run browser benchmarks
+npm run bench -- --mode browser
+npm run bench -- --mode browser --provider browserbase
+
+# Run storage benchmarks
+npm run bench -- --mode storage
+npm run bench -- --mode storage --provider aws-s3
+npm run bench -- --mode storage --file-size 100MB
 ```
 
 ### Code Style
diff --git a/package-lock.json b/package-lock.json
index 90f1319..819ed4d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,27 +9,29 @@
       "version": "1.0.0",
       "dependencies": {
         "@computesdk/blaxel": "^1.6.7",
-        "@computesdk/cloudflare": "^1.6.0",
-        "@computesdk/codesandbox": "^1.5.40",
-        "@computesdk/daytona": "^1.7.14",
-        "@computesdk/e2b": "^1.7.34",
-        "@computesdk/hopx": "^0.2.10",
-        "@computesdk/just-bash": "^0.3.0",
-        "@computesdk/modal": "^1.8.29",
-        "@computesdk/namespace": "^1.5.0",
-        "@computesdk/r2": "^1.0.0",
-        "@computesdk/runloop": "^1.3.36",
-        "@computesdk/s3": "^1.0.0",
-        "@computesdk/sprites": "^0.1.1",
-        "@computesdk/tigris": "^1.0.0",
-        "@computesdk/vercel": "^1.7.13",
-        "computesdk": "^2.2.1",
-        "dotenv": "^17.2.1"
+        "@computesdk/browserbase": "^0.3.0",
+        "@computesdk/cloudflare": "^1.6.4",
+        "@computesdk/codesandbox": "^1.5.42",
+        "@computesdk/daytona": "^1.7.22",
+        "@computesdk/e2b": "^1.7.42",
+        "@computesdk/hopx": "^0.2.18",
+        "@computesdk/just-bash": "^0.4.6",
+        "@computesdk/modal": "^1.8.37",
+        "@computesdk/namespace": "^1.6.4",
+        "@computesdk/r2": "^1.1.1",
+        "@computesdk/runloop": "^1.3.42",
+        "@computesdk/s3": "^1.1.1",
+        "@computesdk/sprites": "^0.1.5",
+        "@computesdk/tigris": "^1.1.1",
+        "@computesdk/vercel": "^1.7.21",
+        "computesdk": "^2.5.4",
+        "dotenv": "^17.4.0",
+        "playwright-core": "^1.59.1"
       },
       "devDependencies": {
-        "@types/node": "^20.0.0",
-        "tsx": "^4.0.0",
-        "typescript": "^5.0.0"
+        "@types/node": "^25.5.0",
+        "tsx": "^4.21.0",
+        "typescript": "^6.0.2"
       }
     },
     "node_modules/@alcalzone/ansi-tokenize": {
@@ -248,9 +250,9 @@
       }
     },
     "node_modules/@aws-sdk/client-s3": {
-      "version": "3.1021.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/client-s3/-/client-s3-3.1021.0.tgz",
-      "integrity": "sha512-BCfggq8gYSjlKOZlMSVApix3cgKAQIWGeoJFX/AU5HMvqz1BZBEw83jJFL9LYrqTPCocH8NGl++1Xr70ro+jcg==",
+      "version": "3.1022.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/client-s3/-/client-s3-3.1022.0.tgz",
+      "integrity": "sha512-PhdIW0LxjzcMlBiCldRefnyZk84wtYGnEV0sNGOD55DZTvZsibG2XHvQiL1aFliKugfAhuIpNmFkctI2n2I3Dg==",
       "license": "Apache-2.0",
       "peer": true,
       "dependencies": {
@@ -510,9 +512,9 @@
       }
     },
     "node_modules/@aws-sdk/lib-storage": {
-      "version": "3.1021.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/lib-storage/-/lib-storage-3.1021.0.tgz",
-      "integrity": "sha512-DmbaWPd4HSbz/gLS6tFZ6hTjDw3OvgheOqEywT/Z8sxdaSMIkEJjt2CcYKy7YiqG3DrkvZ/te5oGjgIQOUlhnw==",
+      "version": "3.1022.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/lib-storage/-/lib-storage-3.1022.0.tgz",
+      "integrity": "sha512-RozYW8R0O+Ld+qLYtIgOSt9iD31rC+G1vGmPkZN9aGf9FqGCwt0Fumsaa8CNLbzcI/O6PyL4g4OJgsCpmSTX4Q==",
       "license": "Apache-2.0",
       "dependencies": {
         "@smithy/middleware-endpoint": "^4.4.28",
@@ -528,7 +530,7 @@
         "node": ">=20.0.0"
       },
       "peerDependencies": {
-        "@aws-sdk/client-s3": "^3.1021.0"
+        "@aws-sdk/client-s3": "^3.1022.0"
       }
     },
     "node_modules/@aws-sdk/middleware-bucket-endpoint": {
@@ -772,9 +774,9 @@
       }
     },
     "node_modules/@aws-sdk/s3-request-presigner": {
-      "version": "3.1021.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/s3-request-presigner/-/s3-request-presigner-3.1021.0.tgz",
-      "integrity": "sha512-kkIzsIAc7wnG7vVRkZFIwJ3noOyF3S6ozOQ9t2KxzPde1LsmpmPwYbmiB91DzdfuGySdk4Hpb0JmHh4KhGECXQ==",
+      "version": "3.1022.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/s3-request-presigner/-/s3-request-presigner-3.1022.0.tgz",
+      "integrity": "sha512-2arKiJswYGEOScAhEeOuy/1A1wScfgbfmU/6NAn0UK0/LDxqsOTc4/bCEuUK+/LtB+Lxu3rODqbY8V5gTGPLaQ==",
       "license": "Apache-2.0",
       "dependencies": {
         "@aws-sdk/signature-v4-multi-region": "^3.996.15",
@@ -999,6 +1001,35 @@
         "url": "https://github.com/sponsors/Borewit"
       }
     },
+    "node_modules/@browserbasehq/sdk": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/@browserbasehq/sdk/-/sdk-2.9.0.tgz",
+      "integrity": "sha512-Xzm1+6suzQypXjley4Phqer++pjnYyST6S7CArUn3kWyGA8aruXjAV5wkmqE21lgXo9K3/OQJvCu48bKEZFNDQ==",
+      "dependencies": {
+        "@types/node": "^18.11.18",
+        "@types/node-fetch": "^2.6.4",
+        "abort-controller": "^3.0.0",
+        "agentkeepalive": "^4.2.1",
+        "form-data-encoder": "1.7.2",
+        "formdata-node": "^4.3.2",
+        "node-fetch": "^2.6.7"
+      }
+    },
+    "node_modules/@browserbasehq/sdk/node_modules/@types/node": {
+      "version": "18.19.130",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.19.130.tgz",
+      "integrity": "sha512-GRaXQx6jGfL8sKfaIDD6OupbIHBr9jv7Jnaml9tB7l4v068PAOXqfcujMMo5PhbIs6ggR1XODELqahT2R8v0fg==",
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~5.26.4"
+      }
+    },
+    "node_modules/@browserbasehq/sdk/node_modules/undici-types": {
+      "version": "5.26.5",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",
+      "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
+      "license": "MIT"
+    },
     "node_modules/@bufbuild/protobuf": {
       "version": "2.11.0",
       "resolved": "https://registry.npmjs.org/@bufbuild/protobuf/-/protobuf-2.11.0.tgz",
@@ -1183,6 +1214,31 @@
         "computesdk": "2.5.4"
       }
     },
+    "node_modules/@computesdk/browserbase": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@computesdk/browserbase/-/browserbase-0.3.0.tgz",
+      "integrity": "sha512-zsZgbn1CQNrFmGRA/Iyxu1xYf4sL5p60neAmR3cdzUrZndxz2WEzWfIQmxFnNazcdxA0mOkdvRNlt352xsG3Nw==",
+      "license": "MIT",
+      "dependencies": {
+        "@browserbasehq/sdk": "^2.0.0",
+        "@computesdk/provider": "1.1.0",
+        "computesdk": "2.5.4",
+        "dotenv": "^16.0.0",
+        "playwright-core": "^1.40.0"
+      }
+    },
+    "node_modules/@computesdk/browserbase/node_modules/dotenv": {
+      "version": "16.6.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
+      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/@computesdk/cloudflare": {
       "version": "1.6.4",
       "resolved": "https://registry.npmjs.org/@computesdk/cloudflare/-/cloudflare-1.6.4.tgz",
@@ -1248,37 +1304,18 @@
       }
     },
     "node_modules/@computesdk/just-bash": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/@computesdk/just-bash/-/just-bash-0.3.0.tgz",
-      "integrity": "sha512-7Kjzg/Nxge3uU7xUKePddElroBEVi8om4Rqs5DHDrk1Vzz4+EzNPDUCgpGLdB8Qi0f2hB21lzUw7u5NQO4VLVg==",
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/@computesdk/just-bash/-/just-bash-0.4.6.tgz",
+      "integrity": "sha512-OfACkKbOOQkuutL8qIKpVYQQ6eECHxiSjbK3WB4NUis7YCQ7gaxNLHJJ8c+cI9L0wvL5kPuK53+QpnfSVYhXhQ==",
       "license": "MIT",
       "dependencies": {
-        "@computesdk/provider": "1.0.28",
-        "computesdk": "2.3.0"
+        "@computesdk/provider": "1.1.0",
+        "computesdk": "2.5.4"
       },
       "peerDependencies": {
         "just-bash": ">=2.0.0"
       }
     },
-    "node_modules/@computesdk/just-bash/node_modules/@computesdk/provider": {
-      "version": "1.0.28",
-      "resolved": "https://registry.npmjs.org/@computesdk/provider/-/provider-1.0.28.tgz",
-      "integrity": "sha512-ecn/AFiLpr5GCU0r6VkwBrwYnFULIoJ2K1oiJ7TBqj0pAYmQsFgv8i5b4VRbKab1FGG5zCXthaFY/3liTYjzCg==",
-      "license": "MIT",
-      "dependencies": {
-        "@computesdk/cmd": "0.4.1",
-        "computesdk": "2.3.0"
-      }
-    },
-    "node_modules/@computesdk/just-bash/node_modules/computesdk": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/computesdk/-/computesdk-2.3.0.tgz",
-      "integrity": "sha512-4B7CRN2qB6XkuAnN7dZ0aMYqHaFrh2qdSuh02lM+cgMEQ7wZy9v44FAjBGfWebHXuPNA/nZRx7211U6CEiGdTw==",
-      "license": "MIT",
-      "dependencies": {
-        "@computesdk/cmd": "0.4.1"
-      }
-    },
     "node_modules/@computesdk/modal": {
       "version": "1.8.37",
       "resolved": "https://registry.npmjs.org/@computesdk/modal/-/modal-1.8.37.tgz",
@@ -1445,9 +1482,9 @@
       }
     },
     "node_modules/@esbuild/aix-ppc64": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.4.tgz",
-      "integrity": "sha512-cQPwL2mp2nSmHHJlCyoXgHGhbEPMrEEU5xhkcy3Hs/O7nGZqEpZ2sUtLaL9MORLtDfRvVl2/3PAuEkYZH0Ty8Q==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.5.tgz",
+      "integrity": "sha512-nGsF/4C7uzUj+Nj/4J+Zt0bYQ6bz33Phz8Lb2N80Mti1HjGclTJdXZ+9APC4kLvONbjxN1zfvYNd8FEcbBK/MQ==",
       "cpu": [
         "ppc64"
       ],
@@ -1462,9 +1499,9 @@
       }
     },
     "node_modules/@esbuild/android-arm": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.27.4.tgz",
-      "integrity": "sha512-X9bUgvxiC8CHAGKYufLIHGXPJWnr0OCdR0anD2e21vdvgCI8lIfqFbnoeOz7lBjdrAGUhqLZLcQo6MLhTO2DKQ==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.27.5.tgz",
+      "integrity": "sha512-Cv781jd0Rfj/paoNrul1/r4G0HLvuFKYh7C9uHZ2Pl8YXstzvCyyeWENTFR9qFnRzNMCjXmsulZuvosDg10Mog==",
       "cpu": [
         "arm"
       ],
@@ -1479,9 +1516,9 @@
       }
     },
     "node_modules/@esbuild/android-arm64": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.27.4.tgz",
-      "integrity": "sha512-gdLscB7v75wRfu7QSm/zg6Rx29VLdy9eTr2t44sfTW7CxwAtQghZ4ZnqHk3/ogz7xao0QAgrkradbBzcqFPasw==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.27.5.tgz",
+      "integrity": "sha512-Oeghq+XFgh1pUGd1YKs4DDoxzxkoUkvko+T/IVKwlghKLvvjbGFB3ek8VEDBmNvqhwuL0CQS3cExdzpmUyIrgA==",
       "cpu": [
         "arm64"
       ],
@@ -1496,9 +1533,9 @@
       }
     },
     "node_modules/@esbuild/android-x64": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.27.4.tgz",
-      "integrity": "sha512-PzPFnBNVF292sfpfhiyiXCGSn9HZg5BcAz+ivBuSsl6Rk4ga1oEXAamhOXRFyMcjwr2DVtm40G65N3GLeH1Lvw==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.27.5.tgz",
+      "integrity": "sha512-nQD7lspbzerlmtNOxYMFAGmhxgzn8Z7m9jgFkh6kpkjsAhZee1w8tJW3ZlW+N9iRePz0oPUDrYrXidCPSImD0Q==",
       "cpu": [
         "x64"
       ],
@@ -1513,9 +1550,9 @@
       }
     },
     "node_modules/@esbuild/darwin-arm64": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.27.4.tgz",
-      "integrity": "sha512-b7xaGIwdJlht8ZFCvMkpDN6uiSmnxxK56N2GDTMYPr2/gzvfdQN8rTfBsvVKmIVY/X7EM+/hJKEIbbHs9oA4tQ==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.27.5.tgz",
+      "integrity": "sha512-I+Ya/MgC6rr8oRWGRDF3BXDfP8K1BVUggHqN6VI2lUZLdDi1IM1v2cy0e3lCPbP+pVcK3Tv8cgUhHse1kaNZZw==",
       "cpu": [
         "arm64"
       ],
@@ -1530,9 +1567,9 @@
       }
     },
     "node_modules/@esbuild/darwin-x64": {
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-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/@vercel/sandbox/-/sandbox-1.9.0.tgz",
-      "integrity": "sha512-zgr1ad0tkT1xZn/8Vxo60wOUOLqMAVGo4WqJQ8/UDcUtWynNJsBjI2tiMdWZrAo9EKH1MIqEzJNkcclF0UT1EQ==",
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/@vercel/sandbox/-/sandbox-1.9.1.tgz",
+      "integrity": "sha512-Y9nZk19GPXiKihLqa0bACbjBo2R0G1/0NHthn9e6kqI/ypK6z3liAsQ+RncjXIDDiBun6gJYOw73V8JADuUO8g==",
       "license": "Apache-2.0",
       "dependencies": {
         "@vercel/oidc": "3.2.0",
+        "@workflow/serde": "4.1.0-beta.2",
         "async-retry": "1.3.3",
         "jsonlines": "0.1.1",
         "ms": "2.1.3",
@@ -6503,6 +6541,12 @@
         "url": "https://github.com/sponsors/colinhacks"
       }
     },
+    "node_modules/@workflow/serde": {
+      "version": "4.1.0-beta.2",
+      "resolved": "https://registry.npmjs.org/@workflow/serde/-/serde-4.1.0-beta.2.tgz",
+      "integrity": "sha512-8kkeoQKLDaKXefjV5dbhBj2aErfKp1Mc4pb6tj8144cF+Em5SPbyMbyLCHp+BVrFfFVCBluCtMx+jjvaFVZGww==",
+      "license": "Apache-2.0"
+    },
     "node_modules/@xterm/addon-serialize": {
       "version": "0.13.0",
       "resolved": "https://registry.npmjs.org/@xterm/addon-serialize/-/addon-serialize-0.13.0.tgz",
@@ -6954,6 +6998,12 @@
         "node": ">=0.8.0"
       }
     },
+    "node_modules/blessed-contrib/node_modules/lodash": {
+      "version": "4.17.23",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
+      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
+      "license": "MIT"
+    },
     "node_modules/blessed-contrib/node_modules/supports-color": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -7876,9 +7926,9 @@
       }
     },
     "node_modules/dotenv": {
-      "version": "17.3.1",
-      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.3.1.tgz",
-      "integrity": "sha512-IO8C/dzEb6O3F9/twg6ZLXz164a2fhTnEWb95H23Dm4OuN+92NmEAlTrupP9VW6Jm3sO26tQlqyvyi4CsnY9GA==",
+      "version": "17.4.0",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.4.0.tgz",
+      "integrity": "sha512-kCKF62fwtzwYm0IGBNjRUjtJgMfGapII+FslMHIjMR5KTnwEmBmWLDRSnc3XSNP8bNy34tekgQyDT0hr7pERRQ==",
       "license": "BSD-2-Clause",
       "engines": {
         "node": ">=12"
@@ -8155,9 +8205,9 @@
       ]
     },
     "node_modules/esbuild": {
-      "version": "0.27.4",
-      "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.4.tgz",
-      "integrity": "sha512-Rq4vbHnYkK5fws5NF7MYTU68FPRE1ajX7heQ/8QXXWqNgqqJ/GkmmyxIzUnf2Sr/bakf8l54716CcMGHYhMrrQ==",
+      "version": "0.27.5",
+      "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.5.tgz",
+      "integrity": "sha512-zdQoHBjuDqKsvV5OPaWansOwfSQ0Js+Uj9J85TBvj3bFW1JjWTSULMRwdQAc8qMeIScbClxeMK0jlrtB9linhA==",
       "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
@@ -8168,32 +8218,32 @@
         "node": ">=18"
       },
       "optionalDependencies": {
-        "@esbuild/aix-ppc64": "0.27.4",
-        "@esbuild/android-arm": "0.27.4",
-        "@esbuild/android-arm64": "0.27.4",
-        "@esbuild/android-x64": "0.27.4",
-        "@esbuild/darwin-arm64": "0.27.4",
-        "@esbuild/darwin-x64": "0.27.4",
-        "@esbuild/freebsd-arm64": "0.27.4",
-        "@esbuild/freebsd-x64": "0.27.4",
-        "@esbuild/linux-arm": "0.27.4",
-        "@esbuild/linux-arm64": "0.27.4",
-        "@esbuild/linux-ia32": "0.27.4",
-        "@esbuild/linux-loong64": "0.27.4",
-        "@esbuild/linux-mips64el": "0.27.4",
-        "@esbuild/linux-ppc64": "0.27.4",
-        "@esbuild/linux-riscv64": "0.27.4",
-        "@esbuild/linux-s390x": "0.27.4",
-        "@esbuild/linux-x64": "0.27.4",
-        "@esbuild/netbsd-arm64": "0.27.4",
-        "@esbuild/netbsd-x64": "0.27.4",
-        "@esbuild/openbsd-arm64": "0.27.4",
-        "@esbuild/openbsd-x64": "0.27.4",
-        "@esbuild/openharmony-arm64": "0.27.4",
-        "@esbuild/sunos-x64": "0.27.4",
-        "@esbuild/win32-arm64": "0.27.4",
-        "@esbuild/win32-ia32": "0.27.4",
-        "@esbuild/win32-x64": "0.27.4"
+        "@esbuild/aix-ppc64": "0.27.5",
+        "@esbuild/android-arm": "0.27.5",
+        "@esbuild/android-arm64": "0.27.5",
+        "@esbuild/android-x64": "0.27.5",
+        "@esbuild/darwin-arm64": "0.27.5",
+        "@esbuild/darwin-x64": "0.27.5",
+        "@esbuild/freebsd-arm64": "0.27.5",
+        "@esbuild/freebsd-x64": "0.27.5",
+        "@esbuild/linux-arm": "0.27.5",
+        "@esbuild/linux-arm64": "0.27.5",
+        "@esbuild/linux-ia32": "0.27.5",
+        "@esbuild/linux-loong64": "0.27.5",
+        "@esbuild/linux-mips64el": "0.27.5",
+        "@esbuild/linux-ppc64": "0.27.5",
+        "@esbuild/linux-riscv64": "0.27.5",
+        "@esbuild/linux-s390x": "0.27.5",
+        "@esbuild/linux-x64": "0.27.5",
+        "@esbuild/netbsd-arm64": "0.27.5",
+        "@esbuild/netbsd-x64": "0.27.5",
+        "@esbuild/openbsd-arm64": "0.27.5",
+        "@esbuild/openbsd-x64": "0.27.5",
+        "@esbuild/openharmony-arm64": "0.27.5",
+        "@esbuild/sunos-x64": "0.27.5",
+        "@esbuild/win32-arm64": "0.27.5",
+        "@esbuild/win32-ia32": "0.27.5",
+        "@esbuild/win32-x64": "0.27.5"
       }
     },
     "node_modules/escalade": {
@@ -8982,9 +9032,9 @@
       }
     },
     "node_modules/hono": {
-      "version": "4.12.9",
-      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.9.tgz",
-      "integrity": "sha512-wy3T8Zm2bsEvxKZM5w21VdHDDcwVS1yUFFY6i8UobSsKfFceT7TOwhbhfKsDyx7tYQlmRM5FLpIuYvNFyjctiA==",
+      "version": "4.12.10",
+      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.10.tgz",
+      "integrity": "sha512-mx/p18PLy5og9ufies2GOSUqep98Td9q4i/EF6X7yJgAiIopxqdfIO3jbqsi3jRgTgw88jMDEzVKi+V2EF+27w==",
       "license": "MIT",
       "peer": true,
       "engines": {
@@ -9684,9 +9734,9 @@
       }
     },
     "node_modules/lodash": {
-      "version": "4.17.23",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
-      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
+      "version": "4.18.1",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.18.1.tgz",
+      "integrity": "sha512-dMInicTPVE8d1e5otfwmmjlxkZoUpiVLwyeTdUsi/Caj/gfzzblBcCE5sRHV/AsjuCmxWrte2TNGSYuCeCq+0Q==",
       "license": "MIT"
     },
     "node_modules/lodash.camelcase": {
@@ -10232,9 +10282,9 @@
       }
     },
     "node_modules/nypm/node_modules/citty": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/citty/-/citty-0.2.1.tgz",
-      "integrity": "sha512-kEV95lFBhQgtogAPlQfJJ0WGVSokvLr/UEoFPiKKOXF7pl98HfUVUD0ejsuTCld/9xH9vogSywZ5KqHzXrZpqg==",
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/citty/-/citty-0.2.2.tgz",
+      "integrity": "sha512-+6vJA3L98yv+IdfKGZHBNiGW5KHn22e/JwID0Strsz8h4S/csAu/OuICwxrg44k5MRiZHWIo8XXuJgQTriRP4w==",
       "license": "MIT"
     },
     "node_modules/object-assign": {
@@ -10581,9 +10631,9 @@
       }
     },
     "node_modules/path-to-regexp": {
-      "version": "8.4.1",
-      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.4.1.tgz",
-      "integrity": "sha512-fvU78fIjZ+SBM9YwCknCvKOUKkLVqtWDVctl0s7xIqfmfb38t2TT4ZU2gHm+Z8xGwgW+QWEU3oQSAzIbo89Ggw==",
+      "version": "8.4.2",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.4.2.tgz",
+      "integrity": "sha512-qRcuIdP69NPm4qbACK+aDogI5CBDMi1jKe0ry5rSQJz8JVLsC7jV8XpiJjGRLLol3N+R5ihGYcrPLTno6pAdBA==",
       "license": "MIT",
       "funding": {
         "type": "opencollective",
@@ -10715,6 +10765,18 @@
       "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
       "license": "MIT"
     },
+    "node_modules/playwright-core": {
+      "version": "1.59.1",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.59.1.tgz",
+      "integrity": "sha512-HBV/RJg81z5BiiZ9yPzIiClYV/QMsDCKUyogwH9p3MCP6IYjUFu/MActgYAvK0oWyV9NlwM3GLBjADyWgydVyg==",
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/png-js": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/png-js/-/png-js-0.1.1.tgz",
@@ -12183,9 +12245,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.2.tgz",
+      "integrity": "sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==",
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
@@ -12217,9 +12279,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "6.21.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
-      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "version": "7.18.2",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
+      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
       "license": "MIT"
     },
     "node_modules/unpipe": {
diff --git a/package.json b/package.json
index 2dfb114..1eccef1 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,8 @@
     "bench:vercel": "tsx src/run.ts --provider vercel",
     "bench:just-bash": "tsx src/run.ts --provider just-bash",
     "bench:sprites": "tsx src/run.ts --provider sprites",
+    "bench:browser": "tsx src/run.ts --mode browser",
+    "bench:browser:browserbase": "tsx src/run.ts --mode browser --provider browserbase",
     "bench:storage": "tsx src/run.ts --mode storage",
     "bench:storage:s3": "tsx src/run.ts --mode storage --provider aws-s3",
     "bench:storage:r2": "tsx src/run.ts --mode storage --provider cloudflare-r2",
@@ -38,26 +40,28 @@
   },
   "dependencies": {
     "@computesdk/blaxel": "^1.6.7",
-    "@computesdk/cloudflare": "^1.6.0",
-    "@computesdk/codesandbox": "^1.5.40",
-    "@computesdk/daytona": "^1.7.14",
-    "@computesdk/e2b": "^1.7.34",
-    "@computesdk/hopx": "^0.2.10",
-    "@computesdk/just-bash": "^0.3.0",
-    "@computesdk/modal": "^1.8.29",
-    "@computesdk/namespace": "^1.5.0",
-    "@computesdk/r2": "^1.0.0",
-    "@computesdk/runloop": "^1.3.36",
-    "@computesdk/s3": "^1.0.0",
-    "@computesdk/sprites": "^0.1.1",
-    "@computesdk/tigris": "^1.0.0",
-    "@computesdk/vercel": "^1.7.13",
-    "computesdk": "^2.2.1",
-    "dotenv": "^17.2.1"
+    "@computesdk/browserbase": "^0.3.0",
+    "@computesdk/cloudflare": "^1.6.4",
+    "@computesdk/codesandbox": "^1.5.42",
+    "@computesdk/daytona": "^1.7.22",
+    "@computesdk/e2b": "^1.7.42",
+    "@computesdk/hopx": "^0.2.18",
+    "@computesdk/just-bash": "^0.4.6",
+    "@computesdk/modal": "^1.8.37",
+    "@computesdk/namespace": "^1.6.4",
+    "@computesdk/r2": "^1.1.1",
+    "@computesdk/runloop": "^1.3.42",
+    "@computesdk/s3": "^1.1.1",
+    "@computesdk/sprites": "^0.1.5",
+    "@computesdk/tigris": "^1.1.1",
+    "@computesdk/vercel": "^1.7.21",
+    "computesdk": "^2.5.4",
+    "dotenv": "^17.4.0",
+    "playwright-core": "^1.59.1"
   },
   "devDependencies": {
-    "@types/node": "^20.0.0",
-    "tsx": "^4.0.0",
-    "typescript": "^5.0.0"
+    "@types/node": "^25.5.0",
+    "tsx": "^4.21.0",
+    "typescript": "^6.0.2"
   }
 }
diff --git a/src/browser/benchmark.ts b/src/browser/benchmark.ts
new file mode 100644
index 0000000..006ff96
--- /dev/null
+++ b/src/browser/benchmark.ts
@@ -0,0 +1,218 @@
+import { chromium } from 'playwright-core';
+import { withTimeout } from '../util/timeout.js';
+import type { BrowserProviderConfig, BrowserBenchmarkResult, BrowserTimingResult } from './types.js';
+
+function round(n: number): number {
+  return Math.round(n * 100) / 100;
+}
+
+function percentile(sorted: number[], p: number): number {
+  const idx = Math.ceil((p / 100) * sorted.length) - 1;
+  return sorted[Math.min(idx, sorted.length - 1)];
+}
+
+function computeBrowserStats(values: number[]): { median: number; p95: number; p99: number } {
+  if (values.length === 0) return { median: 0, p95: 0, p99: 0 };
+
+  const sorted = [...values].sort((a, b) => a - b);
+  const trimCount = Math.floor(sorted.length * 0.05);
+  const trimmed = trimCount > 0 && sorted.length - 2 * trimCount > 0
+    ? sorted.slice(trimCount, sorted.length - trimCount)
+    : sorted;
+
+  const mid = Math.floor(trimmed.length / 2);
+  const median = trimmed.length % 2 === 0
+    ? (trimmed[mid - 1] + trimmed[mid]) / 2
+    : trimmed[mid];
+
+  return {
+    median,
+    p95: percentile(trimmed, 95),
+    p99: percentile(trimmed, 99),
+  };
+}
+
+async function runBrowserIteration(
+  provider: any,
+  timeout: number,
+): Promise<BrowserTimingResult> {
+  const timings = { createMs: 0, connectMs: 0, navigateMs: 0, releaseMs: 0, totalMs: 0 };
+  const totalStart = performance.now();
+
+  try {
+    // 1. Create session
+    const createStart = performance.now();
+    const session = await withTimeout(
+      provider.session.create(),
+      timeout,
+      'Session creation timed out',
+    ) as { sessionId: string; connectUrl: string };
+    timings.createMs = performance.now() - createStart;
+
+    let browser;
+    try {
+      // 2. Connect over CDP
+      const connectStart = performance.now();
+      browser = await withTimeout(
+        chromium.connectOverCDP(session.connectUrl),
+        30_000,
+        'CDP connection timed out',
+      );
+      const context = await browser.newContext();
+      const page = await context.newPage();
+      timings.connectMs = performance.now() - connectStart;
+
+      // 3. Navigate
+      const navStart = performance.now();
+      await withTimeout(
+        page.goto('https://www.example.com', { waitUntil: 'load' }),
+        30_000,
+        'Navigation timed out',
+      );
+      timings.navigateMs = performance.now() - navStart;
+    } finally {
+      // 4. Close browser and release session
+      if (browser) {
+        await browser.close().catch(() => {});
+      }
+      const releaseStart = performance.now();
+      await withTimeout(
+        provider.session.destroy(session.sessionId),
+        15_000,
+        'Session destroy timed out',
+      );
+      timings.releaseMs = performance.now() - releaseStart;
+    }
+
+    timings.totalMs = performance.now() - totalStart;
+    return { ...timings };
+  } catch (err) {
+    timings.totalMs = performance.now() - totalStart;
+    const error = err instanceof Error ? err.message : String(err);
+    return { ...timings, error };
+  }
+}
+
+export async function runBrowserBenchmark(config: BrowserProviderConfig): Promise<BrowserBenchmarkResult> {
+  const { name, iterations = 25, timeout = 120_000, requiredEnvVars } = config;
+
+  // Check if all required credentials are available
+  const missingVars = requiredEnvVars.filter(v => !process.env[v]);
+  if (missingVars.length > 0) {
+    return {
+      provider: name,
+      mode: 'browser',
+      iterations: [],
+      summary: {
+        createMs: { median: 0, p95: 0, p99: 0 },
+        connectMs: { median: 0, p95: 0, p99: 0 },
+        navigateMs: { median: 0, p95: 0, p99: 0 },
+        releaseMs: { median: 0, p95: 0, p99: 0 },
+        totalMs: { median: 0, p95: 0, p99: 0 },
+      },
+      skipped: true,
+      skipReason: `Missing: ${missingVars.join(', ')}`,
+    };
+  }
+
+  const provider = config.createBrowserProvider();
+  const results: BrowserTimingResult[] = [];
+
+  console.log(`\n--- Browser Benchmarking: ${name} (${iterations} iterations) ---`);
+  console.log('Run  Create   Connect  Navigate Release  Total    Status');
+  console.log('───  ───────  ───────  ──────── ───────  ───────  ──────');
+
+  for (let i = 0; i < iterations; i++) {
+    const result = await runBrowserIteration(provider, timeout);
+    results.push(result);
+
+    const pad = (n: number) => `${Math.round(n)}ms`.padStart(7);
+    const status = result.error ? `✗ ${result.error.slice(0, 40)}` : '✓';
+    console.log(
+      `${String(i + 1).padStart(3)}  ${pad(result.createMs)}  ${pad(result.connectMs)}  ${pad(result.navigateMs)}  ${pad(result.releaseMs)}  ${pad(result.totalMs)}  ${status}`
+    );
+  }
+
+  const successful = results.filter(r => !r.error);
+
+  // If every iteration failed, mark as skipped
+  if (successful.length === 0) {
+    return {
+      provider: name,
+      mode: 'browser',
+      iterations: results,
+      summary: {
+        createMs: { median: 0, p95: 0, p99: 0 },
+        connectMs: { median: 0, p95: 0, p99: 0 },
+        navigateMs: { median: 0, p95: 0, p99: 0 },
+        releaseMs: { median: 0, p95: 0, p99: 0 },
+        totalMs: { median: 0, p95: 0, p99: 0 },
+      },
+      skipped: true,
+      skipReason: 'All iterations failed',
+    };
+  }
+
+  return {
+    provider: name,
+    mode: 'browser',
+    iterations: results,
+    summary: {
+      createMs: computeBrowserStats(successful.map(r => r.createMs)),
+      connectMs: computeBrowserStats(successful.map(r => r.connectMs)),
+      navigateMs: computeBrowserStats(successful.map(r => r.navigateMs)),
+      releaseMs: computeBrowserStats(successful.map(r => r.releaseMs)),
+      totalMs: computeBrowserStats(successful.map(r => r.totalMs)),
+    },
+  };
+}
+
+function roundStats(s: { median: number; p95: number; p99: number }) {
+  return { median: round(s.median), p95: round(s.p95), p99: round(s.p99) };
+}
+
+export async function writeBrowserResultsJson(results: BrowserBenchmarkResult[], outPath: string): Promise<void> {
+  const fs = await import('fs');
+  const os = await import('os');
+
+  const cleanResults = results.map(r => ({
+    provider: r.provider,
+    mode: r.mode,
+    iterations: r.iterations.map(i => ({
+      createMs: round(i.createMs),
+      connectMs: round(i.connectMs),
+      navigateMs: round(i.navigateMs),
+      releaseMs: round(i.releaseMs),
+      totalMs: round(i.totalMs),
+      ...(i.error ? { error: i.error } : {}),
+    })),
+    summary: {
+      createMs: roundStats(r.summary.createMs),
+      connectMs: roundStats(r.summary.connectMs),
+      navigateMs: roundStats(r.summary.navigateMs),
+      releaseMs: roundStats(r.summary.releaseMs),
+      totalMs: roundStats(r.summary.totalMs),
+    },
+    ...(r.compositeScore !== undefined ? { compositeScore: round(r.compositeScore) } : {}),
+    ...(r.successRate !== undefined ? { successRate: round(r.successRate) } : {}),
+    ...(r.skipped ? { skipped: r.skipped, skipReason: r.skipReason } : {}),
+  }));
+
+  const output = {
+    version: '1.0',
+    timestamp: new Date().toISOString(),
+    environment: {
+      node: process.version,
+      platform: os.platform(),
+      arch: os.arch(),
+    },
+    config: {
+      iterations: results[0]?.iterations.length || 0,
+      timeoutMs: 120000,
+    },
+    results: cleanResults,
+  };
+
+  fs.writeFileSync(outPath, JSON.stringify(output, null, 2));
+  console.log(`Results written to ${outPath}`);
+}
diff --git a/src/browser/providers.ts b/src/browser/providers.ts
new file mode 100644
index 0000000..9c61610
--- /dev/null
+++ b/src/browser/providers.ts
@@ -0,0 +1,12 @@
+import { browserbase } from '@computesdk/browserbase';
+import type { BrowserProviderConfig } from './types.js';
+
+/**
+ * Browser provider benchmark configurations.
+ *
+ * All providers use ComputeSDK's browser packages directly (no ComputeSDK API key).
+ */
+export const browserProviders: BrowserProviderConfig[] = [
+  //
+  // add more browser providers above
+];
diff --git a/src/browser/scoring.ts b/src/browser/scoring.ts
new file mode 100644
index 0000000..10c6ce5
--- /dev/null
+++ b/src/browser/scoring.ts
@@ -0,0 +1,93 @@
+import type { BrowserBenchmarkResult } from './types.js';
+
+/**
+ * Weight configuration for browser composite scoring.
+ * Total time is weighted highest since it reflects the full user experience.
+ */
+export interface BrowserScoringWeights {
+  totalMedian: number;
+  totalP95: number;
+  totalP99: number;
+  createMedian: number;
+}
+
+export const DEFAULT_BROWSER_WEIGHTS: BrowserScoringWeights = {
+  totalMedian: 0.40,   // 40% - overall latency matters most
+  totalP95: 0.20,      // 20% - tail latency
+  totalP99: 0.10,      // 10% - worst case
+  createMedian: 0.30,  // 30% - session provisioning speed
+};
+
+/** Absolute ceiling for latency in ms. Anything at or above this scores 0. */
+const LATENCY_CEILING_MS = 60000; // 60 seconds
+
+/**
+ * Score a latency value (lower is better).
+ * 0ms = 100, LATENCY_CEILING_MS = 0, values above ceiling are clamped to 0.
+ */
+function scoreLatency(valueMs: number): number {
+  return Math.max(0, 100 * (1 - valueMs / LATENCY_CEILING_MS));
+}
+
+/**
+ * Compute the success rate for a browser benchmark result (0 to 1).
+ */
+export function computeBrowserSuccessRate(result: BrowserBenchmarkResult): number {
+  if (result.skipped || result.iterations.length === 0) return 0;
+  const successful = result.iterations.filter(i => !i.error).length;
+  return successful / result.iterations.length;
+}
+
+/**
+ * Compute a weighted browser score (0-100, higher = better).
+ */
+function computeBrowserScore(
+  result: BrowserBenchmarkResult,
+  weights: BrowserScoringWeights = DEFAULT_BROWSER_WEIGHTS,
+): number {
+  return (
+    weights.totalMedian * scoreLatency(result.summary.totalMs.median) +
+    weights.totalP95 * scoreLatency(result.summary.totalMs.p95) +
+    weights.totalP99 * scoreLatency(result.summary.totalMs.p99) +
+    weights.createMedian * scoreLatency(result.summary.createMs.median)
+  );
+}
+
+/**
+ * Compute composite scores for all browser results and attach them.
+ *
+ * Formula: compositeScore = browserScore × successRate
+ *
+ * Lower latency = better score.
+ * successRate (0-1) acts as a linear multiplier.
+ */
+export function computeBrowserCompositeScores(
+  results: BrowserBenchmarkResult[],
+  weights: BrowserScoringWeights = DEFAULT_BROWSER_WEIGHTS,
+): void {
+  for (const result of results) {
+    const successRate = computeBrowserSuccessRate(result);
+    result.successRate = successRate;
+
+    if (result.skipped || successRate === 0) {
+      result.compositeScore = 0;
+      continue;
+    }
+
+    const browserScore = computeBrowserScore(result, weights);
+    result.compositeScore = Math.round(browserScore * successRate * 100) / 100;
+  }
+}
+
+/**
+ * Sort browser benchmark results by composite score (highest first).
+ * Skipped providers are always last.
+ */
+export function sortBrowserByCompositeScore(results: BrowserBenchmarkResult[]): BrowserBenchmarkResult[] {
+  return [...results].sort((a, b) => {
+    if (a.skipped && !b.skipped) return 1;
+    if (!a.skipped && b.skipped) return -1;
+    if (a.skipped && b.skipped) return 0;
+    return (b.compositeScore ?? 0) - (a.compositeScore ?? 0);
+  });
+}
diff --git a/src/browser/types.ts b/src/browser/types.ts
new file mode 100644
index 0000000..70f59a7
--- /dev/null
+++ b/src/browser/types.ts
@@ -0,0 +1,48 @@
+export interface BrowserProviderConfig {
+  /** Provider name */
+  name: string;
+  /** Number of iterations (default: 25) */
+  iterations?: number;
+  /** Timeout for session creation in ms (default: 120000) */
+  timeout?: number;
+  /** Environment variables that must all be set to run this benchmark */
+  requiredEnvVars: string[];
+  /** Creates a browser provider instance */
+  createBrowserProvider: () => any;
+}
+
+export interface BrowserTimingResult {
+  /** Time to create a browser session in ms */
+  createMs: number;
+  /** Time to connect over CDP in ms */
+  connectMs: number;
+  /** Time to navigate to example.com in ms */
+  navigateMs: number;
+  /** Time to release/destroy the session in ms */
+  releaseMs: number;
+  /** Total time for the full lifecycle in ms */
+  totalMs: number;
+  /** Error message if this iteration failed */
+  error?: string;
+}
+
+export interface BrowserStats {
+  createMs: { median: number; p95: number; p99: number };
+  connectMs: { median: number; p95: number; p99: number };
+  navigateMs: { median: number; p95: number; p99: number };
+  releaseMs: { median: number; p95: number; p99: number };
+  totalMs: { median: number; p95: number; p99: number };
+}
+
+export interface BrowserBenchmarkResult {
+  provider: string;
+  mode: 'browser';
+  iterations: BrowserTimingResult[];
+  summary: BrowserStats;
+  /** Composite weighted score (0-100, higher = better). Computed post-benchmark. */
+  compositeScore?: number;
+  /** Success rate as a fraction (0 to 1). Computed post-benchmark. */
+  successRate?: number;
+  skipped?: boolean;
+  skipReason?: string;
+}
diff --git a/src/merge-results.ts b/src/merge-results.ts
index 8fc47cf..18bbe32 100644
--- a/src/merge-results.ts
+++ b/src/merge-results.ts
@@ -1,7 +1,7 @@
 /**
  * Merge per-provider benchmark results into combined result files.
  *
- * Usage: tsx src/merge-results.ts --input <artifacts-dir> [--mode storage]
+ * Usage: tsx src/merge-results.ts --input <artifacts-dir> [--mode storage|browser]
  *
  * By default, merges sandbox benchmark results: reads latest.json files from
  * the input directory, groups by mode (sequential/staggered/burst), computes
@@ -10,15 +10,21 @@
  * With --mode storage, merges storage benchmark results instead: groups by
  * file size (1mb/10mb/100mb), computes storage-specific composite scores,
  * and writes combined files to results/storage/<size>/latest.json.
+ *
+ * With --mode browser, merges browser benchmark results: deduplicates by
+ * provider, computes browser-specific composite scores, and writes combined
+ * files to results/browser/latest.json.
  */
 import fs from 'fs';
 import path from 'path';
 import { fileURLToPath } from 'url';
 import { computeCompositeScores } from './sandbox/scoring.js';
 import { computeStorageCompositeScores, sortStorageByCompositeScore } from './storage/scoring.js';
+import { computeBrowserCompositeScores, sortBrowserByCompositeScore } from './browser/scoring.js';
 import { printResultsTable, writeResultsJson } from './sandbox/table.js';
 import type { BenchmarkResult } from './sandbox/types.js';
 import type { StorageBenchmarkResult } from './storage/types.js';
+import type { BrowserBenchmarkResult } from './browser/types.js';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const ROOT = path.resolve(__dirname, '..');
@@ -32,7 +38,7 @@ function getArgValue(flag: string): string | undefined {
 const inputDir = getArgValue('--input');
 const mergeMode = getArgValue('--mode');
 if (!inputDir) {
-  console.error('Usage: tsx src/merge-results.ts --input <artifacts-dir> [--mode storage]');
+  console.error('Usage: tsx src/merge-results.ts --input <artifacts-dir> [--mode storage|browser]');
   process.exit(1);
 }
 
@@ -269,7 +275,107 @@ async function mainStorage() {
   }
 }
 
-(mergeMode === 'storage' ? mainStorage() : main()).catch(err => {
+/**
+ * Print a browser results table to stdout.
+ */
+function printBrowserResultsTable(results: BrowserBenchmarkResult[]): void {
+  const sorted = sortBrowserByCompositeScore(results);
+
+  console.log(`\n${'='.repeat(110)}`);
+  console.log('  BROWSER PROVIDER BENCHMARK RESULTS');
+  console.log('='.repeat(110));
+  console.log(
+    ['Provider', 'Score', 'Create', 'Connect', 'Navigate', 'Release', 'Total', 'Status']
+      .map((h, i) => h.padEnd([14, 8, 12, 12, 12, 12, 12, 10][i]))
+      .join(' | ')
+  );
+  console.log(
+    [14, 8, 12, 12, 12, 12, 12, 10].map(w => '-'.repeat(w)).join('-+-')
+  );
+
+  for (const r of sorted) {
+    if (r.skipped) {
+      console.log([r.provider.padEnd(14), '--'.padEnd(8), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), 'SKIPPED'.padEnd(10)].join(' | '));
+      continue;
+    }
+    const ok = r.iterations.filter(i => !i.error).length;
+    const total = r.iterations.length;
+    if (ok === 0 && total > 0) {
+      console.log([r.provider.padEnd(14), '--'.padEnd(8), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), '--'.padEnd(12), 'FAILED'.padEnd(10)].join(' | '));
+      continue;
+    }
+    const score = r.compositeScore !== undefined ? r.compositeScore.toFixed(1) : '--';
+    const create = (r.summary.createMs.median / 1000).toFixed(2) + 's';
+    const connect = (r.summary.connectMs.median / 1000).toFixed(2) + 's';
+    const navigate = (r.summary.navigateMs.median / 1000).toFixed(2) + 's';
+    const release = (r.summary.releaseMs.median / 1000).toFixed(2) + 's';
+    const tot = (r.summary.totalMs.median / 1000).toFixed(2) + 's';
+    console.log([r.provider.padEnd(14), score.padEnd(8), create.padEnd(12), connect.padEnd(12), navigate.padEnd(12), release.padEnd(12), tot.padEnd(12), `${ok}/${total} OK`.padEnd(10)].join(' | '));
+  }
+  console.log('='.repeat(110));
+}
+
+/**
+ * Merge browser benchmark results.
+ */
+async function mainBrowser() {
+  const jsonFiles: string[] = [];
+  function walk(dir: string) {
+    if (!fs.existsSync(dir)) return;
+    for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+      const full = path.join(dir, entry.name);
+      if (entry.isDirectory()) walk(full);
+      else if (entry.name === 'latest.json') jsonFiles.push(full);
+    }
+  }
+  walk(inputDir!);
+
+  if (jsonFiles.length === 0) {
+    console.error(`No latest.json files found in ${inputDir}`);
+    process.exit(1);
+  }
+
+  console.log(`Found ${jsonFiles.length} result files`);
+
+  // Collect all results, deduplicating by provider
+  const seen = new Map<string, { result: BrowserBenchmarkResult; fromSingleProvider: boolean }>();
+
+  for (const file of jsonFiles) {
+    const raw = JSON.parse(fs.readFileSync(file, 'utf-8')) as { results: BrowserBenchmarkResult[] };
+    const fromSingleProvider = raw.results.length === 1;
+    for (const result of raw.results) {
+      const existing = seen.get(result.provider);
+      if (!existing || (fromSingleProvider && !existing.fromSingleProvider)) {
+        seen.set(result.provider, { result, fromSingleProvider });
+      }
+    }
+  }
+
+  const deduped = Array.from(seen.values()).map(e => e.result);
+  console.log(`\nMerging ${deduped.length} provider results for mode: browser`);
+
+  // Compute composite scores
+  computeBrowserCompositeScores(deduped);
+
+  // Print table
+  printBrowserResultsTable(deduped);
+
+  // Write combined results
+  const { writeBrowserResultsJson } = await import('./browser/benchmark.js');
+  const timestamp = new Date().toISOString().slice(0, 10);
+  const resultsDir = path.resolve(ROOT, 'results/browser');
+  fs.mkdirSync(resultsDir, { recursive: true });
+
+  const outPath = path.join(resultsDir, `${timestamp}.json`);
+  await writeBrowserResultsJson(deduped, outPath);
+
+  const latestPath = path.join(resultsDir, 'latest.json');
+  fs.copyFileSync(outPath, latestPath);
+  console.log(`Copied latest: ${latestPath}`);
+}
+
+const runner = mergeMode === 'storage' ? mainStorage : mergeMode === 'browser' ? mainBrowser : main;
+runner().catch(err => {
   console.error('Merge failed:', err);
   process.exit(1);
 });
diff --git a/src/run.ts b/src/run.ts
index f3f75c8..67c1263 100644
--- a/src/run.ts
+++ b/src/run.ts
@@ -6,13 +6,17 @@ import { runBenchmark } from './sandbox/benchmark.js';
 import { runConcurrentBenchmark } from './sandbox/concurrent.js';
 import { runStaggeredBenchmark } from './sandbox/staggered.js';
 import { runStorageBenchmark, writeStorageResultsJson } from './storage/benchmark.js';
+import { runBrowserBenchmark, writeBrowserResultsJson } from './browser/benchmark.js';
 import { printResultsTable, writeResultsJson } from './sandbox/table.js';
 import { providers } from './sandbox/providers.js';
 import { storageProviders } from './storage/providers.js';
+import { browserProviders } from './browser/providers.js';
 import { computeCompositeScores } from './sandbox/scoring.js';
 import { computeStorageCompositeScores } from './storage/scoring.js';
+import { computeBrowserCompositeScores } from './browser/scoring.js';
 import type { BenchmarkResult, BenchmarkMode } from './sandbox/types.js';
 import type { StorageBenchmarkResult } from './storage/types.js';
+import type { BrowserBenchmarkResult } from './browser/types.js';
 
 // Load .env from the benchmarking root
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
@@ -33,9 +37,10 @@ function getArgValue(args: string[], flag: string): string | undefined {
 }
 
 /** Resolve which modes to run */
-function getModesToRun(): BenchmarkMode[] | ['storage'] {
+function getModesToRun(): BenchmarkMode[] | ['storage'] | ['browser'] {
   if (!rawMode) return ['sequential', 'staggered', 'burst'];
   if (rawMode === 'storage') return ['storage'];
+  if (rawMode === 'browser') return ['browser'];
   const m = rawMode === 'concurrent' ? 'burst' : rawMode as BenchmarkMode;
   return [m];
 }
@@ -165,9 +170,76 @@ async function runStorage(toRun: typeof storageProviders, fileSizeLabel: string)
   console.log(`Copied latest: ${latestPath}`);
 }
 
+async function runBrowser(toRun: typeof browserProviders): Promise<void> {
+  console.log('\n' + '='.repeat(70));
+  console.log('  MODE: BROWSER');
+  console.log(`  Iterations per provider: ${iterations}`);
+  console.log('='.repeat(70));
+
+  const results: BrowserBenchmarkResult[] = [];
+
+  for (const providerConfig of toRun) {
+    const result = await runBrowserBenchmark({ ...providerConfig, iterations });
+    results.push(result);
+  }
+
+  // Compute composite scores
+  computeBrowserCompositeScores(results);
+
+  // Print summary
+  console.log('\n--- Browser Benchmark Results ---');
+  for (const r of results) {
+    if (r.skipped) {
+      console.log(`${r.provider}: SKIPPED (${r.skipReason})`);
+      continue;
+    }
+    console.log(`${r.provider}:`);
+    console.log(`  Total: ${(r.summary.totalMs.median / 1000).toFixed(2)}s (median) — create ${(r.summary.createMs.median / 1000).toFixed(2)}s + connect ${(r.summary.connectMs.median / 1000).toFixed(2)}s + navigate ${(r.summary.navigateMs.median / 1000).toFixed(2)}s + release ${(r.summary.releaseMs.median / 1000).toFixed(2)}s`);
+    console.log(`  Score: ${r.compositeScore?.toFixed(1) || '--'}`);
+  }
+
+  // Write JSON results to browser subdirectory
+  const timestamp = new Date().toISOString().slice(0, 10);
+  const resultsDir = path.resolve(__dirname, '../results/browser');
+  fs.mkdirSync(resultsDir, { recursive: true });
+
+  const outPath = path.join(resultsDir, `${timestamp}.json`);
+  await writeBrowserResultsJson(results, outPath);
+
+  // Copy results to latest.json
+  const latestPath = path.join(resultsDir, 'latest.json');
+  fs.copyFileSync(outPath, latestPath);
+  console.log(`Copied latest: ${latestPath}`);
+}
+
 async function main() {
   const modes = getModesToRun();
 
+  // Handle browser mode separately
+  if (modes[0] === 'browser') {
+    console.log('ComputeSDK Browser Provider Benchmarks');
+    console.log(`Date: ${new Date().toISOString()}\n`);
+
+    // Filter browser providers
+    const toRun = providerFilter
+      ? browserProviders.filter(p => p.name === providerFilter)
+      : browserProviders;
+
+    if (toRun.length === 0) {
+      if (providerFilter) {
+        console.error(`Unknown browser provider: ${providerFilter}`);
+        console.error(`Available: ${browserProviders.map(p => p.name).join(', ')}`);
+      } else {
+        console.error('No browser providers configured. Add entries to src/browser/providers.ts.');
+      }
+      process.exit(1);
+    }
+
+    await runBrowser(toRun);
+    console.log('\nAll browser tests complete.');
+    return;
+  }
+
   // Handle storage mode separately
   if (modes[0] === 'storage') {
     console.log('ComputeSDK Storage Provider Benchmarks');
diff --git a/src/storage/providers.ts b/src/storage/providers.ts
index e9f4b92..fbb695e 100644
--- a/src/storage/providers.ts
+++ b/src/storage/providers.ts
@@ -42,5 +42,5 @@ export const storageProviders: StorageProviderConfig[] = [
     fileSizes: [1024 * 1024, 10 * 1024 * 1024],
   },
   // 
-  // add more providers above
+  // add providers above
 ];