Repository: IntegerAlex/fingerprint-oss
Pull request #28: Version .2.4-alpha
Author: login: IntegerAlex
Labels: name: Review effort 1/5
Created: 2025-03-18T00:28:31Z | Merged: 2025-03-28T00:16:02Z

### **PR Type**
Documentation


___

### **Description**
- Added a new version entry for `0.2.4-alpha` in the changelog.


___



### **Changes walkthrough** 📝
<table><thead><tr><th></th><th align="left">Relevant files</th></tr></thead><tbody><tr><td><strong>Documentation</strong></td><td><table>
<tr>
  <td>
    <details>
      <summary><strong>CHANGELOG.md</strong><dd><code>Add version `0.2.4-alpha` to changelog</code>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </dd></summary>
<hr>

CHANGELOG.md

<li>Added a new section for version <code>0.2.4-alpha</code>.<br> <li> Prepared changelog for documenting future changes.


</details>


  </td>
  <td><a href="https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-06572a96a58dc510037d5efa622f9bec8519bc1beab13c9f251e97e657a9d4ed">+2/-0</a>&nbsp; &nbsp; &nbsp; </td>

</tr>
</table></td></tr></tr></tbody></table>

___

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Diff:
diff --git a/.github/playwright_tests b/.github/playwright_tests
new file mode 100644
index 0000000..b60b844
--- /dev/null
+++ b/.github/playwright_tests
@@ -0,0 +1,27 @@
+jobs:
+  tests_e2e:
+    name: Run end-to-end tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      # Set up Node.js in the `./test` folder
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20'  # Specify your desired node version
+
+      - name: Install dependencies
+        run: |
+          cd ./test
+          npm ci  # Install dependencies in the `./test` folder
+
+      - name: Install Playwright browsers
+        run: |
+          cd ./test
+          npx playwright install --with-deps  # Install browsers in the `./test` folder
+
+      - name: Run tests
+        run: |
+          cd ./test
+          npx playwright test  # Run tests from the `./test` folder
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b0c636..0917ec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 _All notable changes to this project will be documented in this file._
 
+## [0.2.4-alpha] - 2025-03-28
+
+### Added
+
+- Hash implementation for generating unique device identifiers
+- Improved hardware concurrency detection with enhanced reliability
+- Added test suite with Playwright for automated testing
+
 ## [0.2.3] - 2025-03-18
 
 ### Added
diff --git a/package.json b/package.json
index 6057eeb..c93dbcc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fingerprint-oss",
-  "version": "0.2.3",
+  "version": "0.2.4-alpha",
   "description": "fingerprint-oss is a javascript util designed to collect various information about the user's device, location, and network.",
   "main": "dist/index.cjs.js",
   "module": "dist/index.esm.js",
@@ -45,5 +45,8 @@
     "typedoc": "^0.27.9",
     "typescript": "^5.0.4",
     "vite": "^4.3.5"
+  },
+  "dependencies": {
+    "hash-wasm": "^4.12.0"
   }
 }
diff --git a/src/hash.ts b/src/hash.ts
index 5785ba7..235a2a7 100644
--- a/src/hash.ts
+++ b/src/hash.ts
@@ -3,5 +3,30 @@
  * @param systemInfo 
  * @returns hash string
  */
+import { sha256 } from 'hash-wasm';
+import { SystemInfo } from './types';
 
+export async function generateId(systemInfo: SystemInfo): Promise<string> {
+  // Get the sorted keys (as strings)
+  const sortedKeys = Object.keys(systemInfo).sort();
+
+  // Create a new object with sorted keys.
+  // We use Record<string, any> so that we don't need to change SystemInfo elsewhere.
+  const sortedSystemInfo: Record<string, any> = {};
+
+  for (const key of sortedKeys) {
+    // Use a type assertion for the key to access systemInfo safely.
+    sortedSystemInfo[key] = systemInfo[key as keyof SystemInfo];
+  }
+
+  // JSON.stringify with a replacer function to handle special values.
+  const hashInput = JSON.stringify(sortedSystemInfo, (key, value) => {
+    if (value === undefined) return 'undefined';
+    if (value === Infinity) return 'Infinity';
+    if (Number.isNaN(value)) return 'NaN';
+    return value;
+  });
+
+  return await sha256(hashInput);
+}
 
diff --git a/src/helper.ts b/src/helper.ts
index fddf7c2..df1cb81 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -1,6 +1,7 @@
 /**
  * Helper functions for fingerprinting
  */
+import { error } from 'console';
 import { FontInfo , MathInfo, PluginInfo, MimeType , TouchSupportInfo, WebGLInfo, CanvasInfo } from './types';
 
 /**
@@ -437,87 +438,107 @@ export function getOSInfo() {
 /**
  * Estimates the number of available logical cores on the device.
  *
- * This function spawns Web Worker instances to execute a compute-intensive task in parallel,
+ * This function spawns Web Worker instances to execute a compute‑intensive task in parallel,
  * simulating the workload across cores. Up to 16 workers are created sequentially, and each worker
- * performs a heavy calculation. If a worker takes longer than 1000ms to complete its task, it is
- * terminated, halting the estimation process. The final count reflects the number of workers that
- * successfully completed the task within the performance threshold. In case of an error, any active
+ * performs a heavy calculation. If a worker takes longer than 1200ms to complete its task, it is
+ * terminated, and the browser‑reported core count is returned. In case of an error, any active
  * workers are terminated and resources are cleaned up before returning the core count.
  *
  * @returns The estimated number of logical cores available on the device.
  */
+export async function estimateCores(): Promise<number> {
+  const MAX_TEST_TIME = 1200; // Extended budget for more reliable results
+  const TARGET_ITERATIONS = 30e6; // Adjusted for modern CPU performance
+  const browserReportedCores = navigator.hardwareConcurrency || 4;
 
-export async function estimateCores():Promise<number> {
-  // Fall back to navigator.hardwareConcurrency if Workers are not supported
+  // Early exit for unsupported environments
   if (typeof Worker === 'undefined') {
-    return navigator.hardwareConcurrency || 1;
+    return Math.min(browserReportedCores, 12);
   }
-  
-  const workers:Worker[] = [];
-  let cores = 0;
-  const MAX_CORES = 16;
-  const TIMEOUT_MS = 2000;
 
   const workerScript = `
-    self.onmessage = () => {
-      let sum = 0;
-      for (let i = 0; i < 5e7; i++) {
-        sum += Math.sqrt(i);
+    self.onmessage = (e) => {
+      const start = performance.now();
+      let result = 0;
+      // Mixed operations to prevent compiler optimizations
+      for (let i = 0; i < ${TARGET_ITERATIONS}; i++) {
+        result += Math.sin(i) * Math.log(i + 1) / (i % 23 + 1);
+        if (i % 1e5 === 0) self.postMessage({ progress: i });
       }
-      self.postMessage(sum);
+      const duration = performance.now() - start;
+      self.postMessage({
+        duration: duration,
+        noise: performance.timeOrigin % 1 + Math.random()
+      });
     };
   `;
 
   const blob = new Blob([workerScript], { type: 'application/javascript' });
   const workerUrl = URL.createObjectURL(blob);
+  const workers: Worker[] = [];
 
   try {
-    //console.log("Starting core estimation...");
-    
-    while (cores < MAX_CORES) {
-      //console.log(`Testing core #${cores + 1}`);
-      const worker = new Worker(workerUrl);
-      const start = performance.now();
-
-      try {
-        await new Promise((resolve, reject) => {
-          worker.onmessage = () => {
-            const time = performance.now() - start;
-     //       console.log(`Worker #${cores + 1} finished in ${time.toFixed(0)}ms`);
-            
-            if (time > 1000) {
-    //          console.warn("Threshold exceeded - stopping");
-              worker.terminate();
-              reject(new Error("Threshold exceeded"));
-            } else {
-              cores++;
-              workers.push(worker);
-              resolve(true);
+    // Immediately invoke the async function so it returns a Promise<number>
+    const corePromise = (async () => {
+      const testConcurrency = Math.min(browserReportedCores * 2, 16);
+      // Create an array of Promises from concurrently running workers
+      const promises = Array.from({ length: testConcurrency }, async () => {
+        const worker = new Worker(workerUrl);
+        workers.push(worker);
+        return new Promise<number>(resolve => {
+          worker.onmessage = (e) => {
+            if (e.data?.duration) {
+              resolve(e.data.duration);
             }
           };
-
-          worker.onerror = (err) => {
-   //         console.error("Worker error:", err);
-            reject(err);
-          };
-
-          worker.postMessage(0);
+          worker.postMessage('start');
         });
-      } catch (workerErr) {
-  //      console.error("Worker promise rejected:", workerErr);
-        throw workerErr;
-      }
+      });
+      const allDurations = await Promise.all(promises);
+      // Sort durations to find the median
+      allDurations.sort((a, b) => a - b);
+      const medianDuration = allDurations[Math.floor(allDurations.length / 2)];
+      
+      // Calculate parallel efficiency
+      const singleThreadTime = medianDuration * testConcurrency;
+      const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
+      const efficiency = (singleThreadTime / theoreticalTime) * 100;
+      
+      // Determine core count based on efficiency threshold
+      let coreEstimate = Math.round(
+        (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
+      );
+      
+      // Cross-validation with hardware report
+      coreEstimate = Math.min(
+        Math.max(coreEstimate, browserReportedCores - 2),
+        browserReportedCores + 2
+      );
+      
+      // Architecture‑specific final check
+      return Math.min(Math.max(coreEstimate, 1), 12);
+    })().catch((err: any) => {
+      console.error("Core estimation failed:", err);
+      return browserReportedCores;
+    });
+
+    // Race the core estimation promise against a timeout promise
+    const results = await Promise.race([
+      corePromise,
+      new Promise<number>(resolve =>
+        setTimeout(() => resolve(browserReportedCores), MAX_TEST_TIME)
+      )
+    ]);
+
+    // Final adjustment for certain browsers
+    if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
+      return Math.min(results, 8);
     }
-
-    // Return the final core count if loop completes
- //   console.log(`Loop completed with ${cores} cores detected`);
-    return cores;
-
+    return Math.min(results, 12);
+    
   } catch (e) {
-    console.error("Estimation failed:", e);
-    return cores; // Ensure we return a number even on failure
+    return browserReportedCores;
   } finally {
-    // Clean up resources in both success and failure cases
     workers.forEach(w => w.terminate());
     URL.revokeObjectURL(workerUrl);
   }
diff --git a/src/json.ts b/src/json.ts
index 4224560..89c7ca8 100644
--- a/src/json.ts
+++ b/src/json.ts
@@ -1,5 +1,6 @@
 import { SystemInfo } from './types.js';
 import { GeolocationInfo } from './geo-ip.js';
+import { generateId } from './hash.js';
 /**
  * Interpret a confidence score and return a human-readable description
  * @param score Confidence score between 0.1 and 0.9
@@ -49,7 +50,7 @@ function interpretConfidenceScore(score: number): {
     }
 }
 
-export function generateJSON(
+export async function generateJSON(
     geolocationInfo: GeolocationInfo | null, 
     systemInfo: SystemInfo, 
     combinedConfidenceScore?: number
@@ -112,7 +113,8 @@ export function generateJSON(
         } : null,
         
         // System information
-        systemInfo
+        systemInfo ,
+	hash: await generateId(systemInfo),
     };
 }
 
diff --git a/src/mock.ts b/src/mock.ts
index 1b98d1f..d39a6b8 100644
--- a/src/mock.ts
+++ b/src/mock.ts
@@ -45,7 +45,9 @@ export function getMockSystemInfo() {
         fontPreferences: { fonts: [] },
         incognito: { isPrivate: false, browserName: 'Test Browser' },
         bot: botInfo,
-        confidenceScore: 0.85
+        confidenceScore: 0.85,
+        // Hash will be generated dynamically by generateId function
+        hash: '5d41402abc4b2a76b9719d911017c592'
     };
 }
 
diff --git a/test/geoInfo.test.js b/test/geoInfo.test.js
new file mode 100644
index 0000000..e737495
--- /dev/null
+++ b/test/geoInfo.test.js
@@ -0,0 +1,44 @@
+import { test, expect } from '@playwright/test';
+test("fingerprint-oss geoInfo test",async({page})=>{
+	await page.goto("http://localhost:8080/");
+
+	page.on("console",(msg)=>console.log(`BROWSER LOG: ${msg.text()}`));
+
+	await page.waitForFunction(()=>window.test !== undefined,{timeout:60000});
+
+	const testData = await page.evaluate(()=>window.test);	
+
+	expect(testData).toBeDefined();
+
+	expect(typeof testData).toBe("object");
+
+
+	expect(testData.geolocation).toBeDefined();
+	
+	expect(testData.geolocation.ip).toBeDefined();
+	expect(typeof testData.geolocation.ip).toBe("string");
+
+	expect(testData.geolocation.city).toBeDefined();
+	expect(typeof testData.geolocation.city).toBe("string");
+
+	expect(testData.geolocation.region).toBeDefined();
+	expect(typeof testData.geolocation.region.isoCode).toBe("string");
+	expect(typeof testData.geolocation.region.name).toBe("string");
+
+	expect(testData.geolocation.country).toBeDefined();
+	expect(typeof testData.geolocation.country.isoCode).toBe("string");
+	expect(typeof testData.geolocation.country.name).toBe("string");
+
+	expect(testData.geolocation.location).toBeDefined();
+	expect(typeof testData.geolocation.location.latitude).toBe("number");
+	expect(typeof testData.geolocation.location.longitude).toBe("number");
+	expect(typeof testData.geolocation.location.accuracyRadius).toBe("number");	
+	expect(typeof testData.geolocation.location.timeZone).toBe("string");
+
+	expect(testData.geolocation.traits).toBeDefined();
+	expect(typeof testData.geolocation.traits.isAnonymous).toBe("boolean");
+	expect(typeof testData.geolocation.traits.isAnonymousProxy).toBe("boolean");
+	expect(typeof testData.geolocation.traits.isAnonymousVpn).toBe("boolean");
+	expect(typeof testData.geolocation.traits.network).toBe("string");
+
+})
diff --git a/test/index.html b/test/index.html
new file mode 100644
index 0000000..0210809
--- /dev/null
+++ b/test/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <script type="module">
+      import { userInfo } from 'https://cdn.jsdelivr.net/npm/fingerprint-oss@0.2.3/dist/index.esm.js';
+
+      document.addEventListener("DOMContentLoaded", function () {
+        userInfo().then(result => {
+	window.test = result;
+          console.log(result);
+          // Process the result here
+        }).catch((error) => {
+          console.error("Error:", error);
+        });
+      });
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
+
diff --git a/test/package.json b/test/package.json
new file mode 100644
index 0000000..e1f8b23
--- /dev/null
+++ b/test/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "fingerprint-oss-test",
+  "version": "0.0.1",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+	"test":"npx playwright test"
+  },
+    "name": "fingerprint-oss-test",
+    "version": "0.0.1",
+    "main": "index.js",
+    "type": "module",
+    "scripts": {
+  	"test":"npx playwright test"
+    },
+    "license": "BSD-3-Clause",
+    "description": "This project contains tests for fingerprint-oss",
+    "author": "Akshat Kotpalliwar",
+  "devDependencies": {
+    "@playwright/test": "^1.51.1",
+    "jest-playwright-preset": "^4.0.0",
+    "playwright": "^1.51.1"
+  },
+  "dependencies": {
+    "fingerprint-oss": "^0.2.3",
+    "vitest": "^3.0.9"
+  }
+}
diff --git a/test/playwright.config.js b/test/playwright.config.js
new file mode 100644
index 0000000..dfffb6d
--- /dev/null
+++ b/test/playwright.config.js
@@ -0,0 +1,29 @@
+import { defineConfig } from '@playwright/test';
+
+export default defineConfig({
+  projects: [
+    {
+      name: 'Chromium',
+      use: { browserName: 'chromium' },  // Browser setup for Chromium
+    },
+    {
+      name: 'Firefox',
+      use: { browserName: 'firefox' },   // Browser setup for Firefox
+    },
+    {
+      name: 'Safari',
+      use: { browserName: 'webkit' },    // Browser setup for WebKit (Safari)
+    },
+    {
+      name:'MsEdge',
+      use:{browserName:'msedge'},
+    },
+    {
+      name:'Chrome',
+      use:{browserName:'chrome'},
+     },	
+
+	  
+  ],
+});
+
diff --git a/test/systemInfo.test.js b/test/systemInfo.test.js
new file mode 100644
index 0000000..c1aecd4
--- /dev/null
+++ b/test/systemInfo.test.js
@@ -0,0 +1,64 @@
+import { test, expect } from '@playwright/test';
+
+test('fingerprint-oss systemInfo Test', async ({ page }) => {
+  // Navigate to the server page where fingerprinting happens
+
+   
+  await page.goto('http://localhost:8080/'); // Ensure the server is running
+
+  // Debug: Log any browser console errors for visibility
+  page.on('console', (msg) => console.log(`BROWSER LOG: ${msg.text()}`));
+
+  // Wait for the fingerprint data to be populated in the window.test variable
+  await page.waitForFunction(() => window.test !== undefined, { timeout: 60000 });
+
+  // Retrieve the actual test data from the browser context
+  const testData = await page.evaluate(() => window.test);
+try{
+  // Debug output for inspection
+  //console.log(testData);
+
+  // Assertions to ensure the fingerprint data is valid
+  expect(testData).toBeDefined(); // Ensure that the data exists
+
+  // Check the type of testData, which should be an object
+  expect(typeof testData).toBe('object');
+
+  // Example checks for system information that are typically collected:
+  // Verify that the system info contains expected values for certain properties
+
+  // Check adBlocker information (adjust based on actual output)
+  expect(testData.systemInfo.adBlocker.adBlocker).toBe(false); // Ensure adblocker is not present
+  expect(testData.systemInfo.adBlocker.isBrave).toBe(false); // Ensure browser isn't Brave
+
+  // Check the browser information
+  expect(['Chrome', 'Firefox', 'Brave', 'Safari']).toContain(testData.systemInfo.incognito.browserName);
+
+  // Validate screen resolution
+  expect(testData.systemInfo.screenResolution).toEqual([1280, 720]); // Ensure resolution is 1920x1080
+
+  // Validate the timezone info (example based on the mock data provided)
+  expect(typeof testData.systemInfo.timezone).toBe('string'); // Ensure timezone is correct
+
+  // Check the device memory (this may vary based on the actual system)
+  //expect(testData.systemInfo.deviceMemory).toBeGreaterThan(0); // Device memory should be greater than 0
+
+  // Check the availability of important browser APIs
+  expect(testData.systemInfo.localStorage).toBe(true); // Ensure localStorage is available
+  expect(testData.systemInfo.sessionStorage).toBe(true); // Ensure sessionStorage is available
+  expect(testData.systemInfo.indexedDB).toBe(true); // Ensure indexedDB is available
+
+  // Check for any bot signals (confidence score should be reasonable)
+  expect(testData.systemInfo.bot.confidence).toBeGreaterThan(0.1); // Ensure confidence is reasonably high (e.g., > 0.7)
+
+  // Check if the fingerprinting system returned a hash (this is typically a hash of various data points)
+  //expect(testData.systemInfo.hash).toMatch(/[a-f0-9]{32}/); // Ensure hash is a valid MD5 hash (adjust depending on your hash algorithm)
+  } catch (error) {
+  // Log the entire testData if any assertion fails
+  console.error('Test failed. Full testData:', JSON.stringify(testData, null, 2));
+  
+  // Rethrow the error to ensure the test still fails
+  throw error;
+}
+});
+
diff --git a/test/vite.config.js b/test/vite.config.js
new file mode 100644
index 0000000..075acc3
--- /dev/null
+++ b/test/vite.config.js
@@ -0,0 +1,15 @@
+// npx playwright install chromium
+
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    environment: ['jsdom','happy-dom'], // Enable browser environment [[6]][[8]]
+    // Optional: Serve test files via Vite's dev server
+    server: {
+      deps: {
+        inline: ['fingerprint-oss'], // Ensure library is bundled
+      },
+    },
+  },
+});


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<details>
<summary>🧹 Nitpick comments (1)</summary><blockquote>

<details>
<summary>CHANGELOG.md (1)</summary><blockquote>

`5-6`: **New version header added for 0.2.4-alpha**

You've correctly added a new section header for version **0.2.4-alpha**. The placement before the existing 0.2.3 entry is appropriate as a placeholder for future release notes. Consider whether a release date or a note indicating that details are forthcoming should be added here, similar to past versions.

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Review comments:
diff_hunk: @@ -446,80 +446,95 @@ export function getOSInfo() {
  *
  * @returns The estimated number of logical cores available on the device.
  */
+export async function estimateCores(): Promise<number> {
+  const MAX_TEST_TIME = 1200; // Extended budget for more reliable results
+  const TARGET_ITERATIONS = 30e6; // Adjusted for modern CPU performance
+  const browserReportedCores = navigator.hardwareConcurrency || 4;
 
-export async function estimateCores():Promise<number> {
-  // Fall back to navigator.hardwareConcurrency if Workers are not supported
+  // Early exit for unsupported environments
   if (typeof Worker === 'undefined') {
-    return navigator.hardwareConcurrency || 1;
+    return Math.min(browserReportedCores, 12);
   }
-  
-  const workers:Worker[] = [];
-  let cores = 0;
-  const MAX_CORES = 16;
-  const TIMEOUT_MS = 2000;
 
   const workerScript = `
-    self.onmessage = () => {
-      let sum = 0;
-      for (let i = 0; i < 5e7; i++) {
-        sum += Math.sqrt(i);
+    self.onmessage = (e) => {
+      const start = performance.now();
+      let result = 0;
+      
+      // Mixed operations to prevent compiler optimizations
+      for (let i = 0; i < ${TARGET_ITERATIONS}; i++) {
+        result += Math.sin(i) * Math.log(i + 1) / (i % 23 + 1);
+        if (i % 1e5 === 0) self.postMessage({ progress: i }); // Anti-optimization checkpoint
       }
-      self.postMessage(sum);
+      
+      const duration = performance.now() - start;
+      self.postMessage({
+        duration: duration,
+        noise: performance.timeOrigin % 1 + Math.random() // Enhanced fingerprint resistance
+      });
     };
   `;
 
   const blob = new Blob([workerScript], { type: 'application/javascript' });
   const workerUrl = URL.createObjectURL(blob);
+  const workers: Worker[] = [];
 
   try {
-    //console.log("Starting core estimation...");
-    
-    while (cores < MAX_CORES) {
-      //console.log(`Testing core #${cores + 1}`);
-      const worker = new Worker(workerUrl);
-      const start = performance.now();
-
-      try {
-        await new Promise((resolve, reject) => {
-          worker.onmessage = () => {
-            const time = performance.now() - start;
-     //       console.log(`Worker #${cores + 1} finished in ${time.toFixed(0)}ms`);
-            
-            if (time > 1000) {
-    //          console.warn("Threshold exceeded - stopping");
-              worker.terminate();
-              reject(new Error("Threshold exceeded"));
-            } else {
-              cores++;
-              workers.push(worker);
-              resolve(true);
-            }
-          };
-
-          worker.onerror = (err) => {
-   //         console.error("Worker error:", err);
-            reject(err);
-          };
-
-          worker.postMessage(0);
+    const results = await Promise.race([
+      (async () => {
+        const testConcurrency = Math.min(browserReportedCores * 2, 16);
+        const timings: number[] = [];
+        
+        // Run multiple concurrent workers
+        const promises = Array.from({ length: testConcurrency }, async () => {
+          const worker = new Worker(workerUrl);
+          workers.push(worker);
+          
+          return new Promise<number>(resolve => {
+            worker.onmessage = (e) => {
+              if (e.data?.duration) resolve(e.data.duration);
+            };
+            worker.postMessage('start');
+          });
         });
-      } catch (workerErr) {
-  //      console.error("Worker promise rejected:", workerErr);
-        throw workerErr;
-      }
-    }
-
-    // Return the final core count if loop completes
- //   console.log(`Loop completed with ${cores} cores detected`);
-    return cores;
 
+        const allDurations = await Promise.all(promises);
+        const medianDuration = allDurations.sort()[Math.floor(allDurations.length / 2)];
+        
+        // Calculate parallel efficiency
+        const singleThreadTime = medianDuration * testConcurrency;
+        const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
+        const efficiency = (singleThreadTime / theoreticalTime) * 100;
+        
+        // Determine core count based on efficiency threshold
+        let coreEstimate = Math.round(
+          (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
+        );
+
+        // Cross-validation with hardware report
+        coreEstimate = Math.min(
+          Math.max(coreEstimate, browserReportedCores - 2),
+          browserReportedCores + 2
+        );
+
+        // Architecture-specific final check
+        return Math.min(coreEstimate, 12);
+      })(),
+      new Promise<number>(resolve => 
+        setTimeout(() => resolve(browserReportedCores), MAX_TEST_TIME)
+      )
+    ]);
+
+    // Final adjustment for known 6-core CPUs
+    if (navigator.userAgent.includes('Firefox')) {
+      return Math.min(results, 8); // Firefox often shows +1 core
+    }
path: src/helper.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Avoid browser detection
```suggestion
    // Use feature detection or capability testing instead of browser detection
    if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
      return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
    }
```

<!-- manually_applied -->
created_at: 2025-03-24T22:10:39Z
author_association: CONTRIBUTOR
diff_hunk: @@ -3,5 +3,12 @@
  * @param systemInfo 
  * @returns hash string
  */
-
+import {sha256} from 'hash-wasm';
+import { SystemInfo } from './types';
+export async function generateId(systemInfo:SystemInfo):Promise<string>{
+ 	// Generate a hash from the system info to identify the user 
+	// The hash is generated by concatenating all the values of the systemInfo object and then hashing the resulting string
+	const hashInput = Object.values(systemInfo).join('|');
+  	return sha256(hashInput);	
+}
path: src/hash.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Missing await for Promise
```suggestion
export async function generateId(systemInfo:SystemInfo):Promise<string>{
 	// Generate a hash from the system info to identify the user 
	// The hash is generated by concatenating all the values of the systemInfo object and then hashing the resulting string
	const hashInput = Object.values(systemInfo).join('|');
  	return await sha256(hashInput);	
}
```

<!-- manually_applied -->
created_at: 2025-03-27T15:10:52Z
author_association: CONTRIBUTOR
diff_hunk: @@ -45,7 +45,8 @@ export function getMockSystemInfo() {
         fontPreferences: { fonts: [] },
         incognito: { isPrivate: false, browserName: 'Test Browser' },
         bot: botInfo,
-        confidenceScore: 0.85
+        confidenceScore: 0.85,
+	hash: 'test'
path: src/mock.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Unrealistic mock data
```suggestion
        confidenceScore: 0.85,
        // Hash will be generated dynamically by generateId function
        hash: '5d41402abc4b2a76b9719d911017c592'
```

<!-- manually_applied -->
created_at: 2025-03-27T15:11:38Z
author_association: CONTRIBUTOR
diff_hunk: @@ -3,5 +3,12 @@
  * @param systemInfo 
  * @returns hash string
  */
-
+import {sha256} from 'hash-wasm';
+import { SystemInfo } from './types';
+export async function generateId(systemInfo:SystemInfo):Promise<string>{
+ 	// Generate a hash from the system info to identify the user 
+	// The hash is generated by concatenating all the values of the systemInfo object and then hashing the resulting string
+	const hashInput = Object.values(systemInfo).join('|');
+  	return await sha256(hashInput);	
+}
path: src/hash.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Ensure consistent hash generation
```suggestion
export async function generateId(systemInfo:SystemInfo):Promise<string>{
 	// Generate a hash from the system info to identify the user 
	// The hash is generated using a stable JSON serialization to ensure consistency
	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort());
  	return await sha256(hashInput);	
}
```

<!-- manually_applied -->
created_at: 2025-03-27T15:14:09Z
author_association: CONTRIBUTOR
diff_hunk: @@ -446,80 +446,96 @@ export function getOSInfo() {
  *
  * @returns The estimated number of logical cores available on the device.
  */
+export async function estimateCores(): Promise<number> {
+  const MAX_TEST_TIME = 1200; // Extended budget for more reliable results
+  const TARGET_ITERATIONS = 30e6; // Adjusted for modern CPU performance
+  const browserReportedCores = navigator.hardwareConcurrency || 4;
 
-export async function estimateCores():Promise<number> {
-  // Fall back to navigator.hardwareConcurrency if Workers are not supported
+  // Early exit for unsupported environments
   if (typeof Worker === 'undefined') {
-    return navigator.hardwareConcurrency || 1;
+    return Math.min(browserReportedCores, 12);
   }
-  
-  const workers:Worker[] = [];
-  let cores = 0;
-  const MAX_CORES = 16;
-  const TIMEOUT_MS = 2000;
 
   const workerScript = `
-    self.onmessage = () => {
-      let sum = 0;
-      for (let i = 0; i < 5e7; i++) {
-        sum += Math.sqrt(i);
+    self.onmessage = (e) => {
+      const start = performance.now();
+      let result = 0;
+      
+      // Mixed operations to prevent compiler optimizations
+      for (let i = 0; i < ${TARGET_ITERATIONS}; i++) {
+        result += Math.sin(i) * Math.log(i + 1) / (i % 23 + 1);
+        if (i % 1e5 === 0) self.postMessage({ progress: i }); // Anti-optimization checkpoint
       }
-      self.postMessage(sum);
+      
+      const duration = performance.now() - start;
+      self.postMessage({
+        duration: duration,
+        noise: performance.timeOrigin % 1 + Math.random() // Enhanced fingerprint resistance
+      });
     };
   `;
 
   const blob = new Blob([workerScript], { type: 'application/javascript' });
   const workerUrl = URL.createObjectURL(blob);
+  const workers: Worker[] = [];
 
   try {
-    //console.log("Starting core estimation...");
-    
-    while (cores < MAX_CORES) {
-      //console.log(`Testing core #${cores + 1}`);
-      const worker = new Worker(workerUrl);
-      const start = performance.now();
-
-      try {
-        await new Promise((resolve, reject) => {
-          worker.onmessage = () => {
-            const time = performance.now() - start;
-     //       console.log(`Worker #${cores + 1} finished in ${time.toFixed(0)}ms`);
-            
-            if (time > 1000) {
-    //          console.warn("Threshold exceeded - stopping");
-              worker.terminate();
-              reject(new Error("Threshold exceeded"));
-            } else {
-              cores++;
-              workers.push(worker);
-              resolve(true);
-            }
-          };
-
-          worker.onerror = (err) => {
-   //         console.error("Worker error:", err);
-            reject(err);
-          };
-
-          worker.postMessage(0);
+    const results = await Promise.race([
+      (async () => {
+        const testConcurrency = Math.min(browserReportedCores * 2, 16);
+        const timings: number[] = [];
+        
+        // Run multiple concurrent workers
+        const promises = Array.from({ length: testConcurrency }, async () => {
+          const worker = new Worker(workerUrl);
+          workers.push(worker);
+          
+          return new Promise<number>(resolve => {
+            worker.onmessage = (e) => {
+              if (e.data?.duration) resolve(e.data.duration);
+            };
+            worker.postMessage('start');
+          });
         });
-      } catch (workerErr) {
-  //      console.error("Worker promise rejected:", workerErr);
-        throw workerErr;
-      }
-    }
-
-    // Return the final core count if loop completes
- //   console.log(`Loop completed with ${cores} cores detected`);
-    return cores;
 
+        const allDurations = await Promise.all(promises);
+        const medianDuration = allDurations.sort()[Math.floor(allDurations.length / 2)];
+        
+        // Calculate parallel efficiency
+        const singleThreadTime = medianDuration * testConcurrency;
+        const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
+        const efficiency = (singleThreadTime / theoreticalTime) * 100;
+        
+        // Determine core count based on efficiency threshold
+        let coreEstimate = Math.round(
+          (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
+        );
+
+        // Cross-validation with hardware report
+        coreEstimate = Math.min(
+          Math.max(coreEstimate, browserReportedCores - 2),
+          browserReportedCores + 2
+        );
+
+        // Architecture-specific final check
+        return Math.min(coreEstimate, 12);
path: src/helper.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Prevent negative core count
```suggestion
        // Architecture-specific final check
        return Math.min(Math.max(coreEstimate, 1), 12);
```

<!-- manually_applied -->
created_at: 2025-03-27T15:15:49Z
author_association: CONTRIBUTOR
diff_hunk: @@ -446,80 +446,96 @@ export function getOSInfo() {
  *
  * @returns The estimated number of logical cores available on the device.
  */
+export async function estimateCores(): Promise<number> {
+  const MAX_TEST_TIME = 1200; // Extended budget for more reliable results
+  const TARGET_ITERATIONS = 30e6; // Adjusted for modern CPU performance
+  const browserReportedCores = navigator.hardwareConcurrency || 4;
 
-export async function estimateCores():Promise<number> {
-  // Fall back to navigator.hardwareConcurrency if Workers are not supported
+  // Early exit for unsupported environments
   if (typeof Worker === 'undefined') {
-    return navigator.hardwareConcurrency || 1;
+    return Math.min(browserReportedCores, 12);
   }
-  
-  const workers:Worker[] = [];
-  let cores = 0;
-  const MAX_CORES = 16;
-  const TIMEOUT_MS = 2000;
 
   const workerScript = `
-    self.onmessage = () => {
-      let sum = 0;
-      for (let i = 0; i < 5e7; i++) {
-        sum += Math.sqrt(i);
+    self.onmessage = (e) => {
+      const start = performance.now();
+      let result = 0;
+      
+      // Mixed operations to prevent compiler optimizations
+      for (let i = 0; i < ${TARGET_ITERATIONS}; i++) {
+        result += Math.sin(i) * Math.log(i + 1) / (i % 23 + 1);
+        if (i % 1e5 === 0) self.postMessage({ progress: i }); // Anti-optimization checkpoint
       }
-      self.postMessage(sum);
+      
+      const duration = performance.now() - start;
+      self.postMessage({
+        duration: duration,
+        noise: performance.timeOrigin % 1 + Math.random() // Enhanced fingerprint resistance
+      });
     };
   `;
 
   const blob = new Blob([workerScript], { type: 'application/javascript' });
   const workerUrl = URL.createObjectURL(blob);
+  const workers: Worker[] = [];
 
   try {
-    //console.log("Starting core estimation...");
-    
-    while (cores < MAX_CORES) {
-      //console.log(`Testing core #${cores + 1}`);
-      const worker = new Worker(workerUrl);
-      const start = performance.now();
-
-      try {
-        await new Promise((resolve, reject) => {
-          worker.onmessage = () => {
-            const time = performance.now() - start;
-     //       console.log(`Worker #${cores + 1} finished in ${time.toFixed(0)}ms`);
-            
-            if (time > 1000) {
-    //          console.warn("Threshold exceeded - stopping");
-              worker.terminate();
-              reject(new Error("Threshold exceeded"));
-            } else {
-              cores++;
-              workers.push(worker);
-              resolve(true);
-            }
-          };
-
-          worker.onerror = (err) => {
-   //         console.error("Worker error:", err);
-            reject(err);
-          };
-
-          worker.postMessage(0);
+    const results = await Promise.race([
+      (async () => {
+        const testConcurrency = Math.min(browserReportedCores * 2, 16);
+        const timings: number[] = [];
+        
+        // Run multiple concurrent workers
+        const promises = Array.from({ length: testConcurrency }, async () => {
+          const worker = new Worker(workerUrl);
+          workers.push(worker);
+          
+          return new Promise<number>(resolve => {
+            worker.onmessage = (e) => {
+              if (e.data?.duration) resolve(e.data.duration);
+            };
+            worker.postMessage('start');
+          });
         });
-      } catch (workerErr) {
-  //      console.error("Worker promise rejected:", workerErr);
-        throw workerErr;
-      }
-    }
-
-    // Return the final core count if loop completes
- //   console.log(`Loop completed with ${cores} cores detected`);
-    return cores;
 
+        const allDurations = await Promise.all(promises);
+        const medianDuration = allDurations.sort()[Math.floor(allDurations.length / 2)];
+        
+        // Calculate parallel efficiency
+        const singleThreadTime = medianDuration * testConcurrency;
+        const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
+        const efficiency = (singleThreadTime / theoreticalTime) * 100;
+        
+        // Determine core count based on efficiency threshold
+        let coreEstimate = Math.round(
+          (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
+        );
+
+        // Cross-validation with hardware report
+        coreEstimate = Math.min(
+          Math.max(coreEstimate, browserReportedCores - 2),
+          browserReportedCores + 2
+        );
+
+        // Architecture-specific final check
+        return Math.min(Math.max(coreEstimate, 1), 12);
path: src/helper.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Add Promise rejection handling
```suggestion
        // Architecture-specific final check
        return Math.min(Math.max(coreEstimate, 1), 12);
        }).catch(err => {
          console.error("Core estimation failed:", err);
          return browserReportedCores;
        }),
```

<!-- manually_applied -->
created_at: 2025-03-27T20:25:26Z
author_association: CONTRIBUTOR
diff_hunk: @@ -3,5 +3,12 @@
  * @param systemInfo 
  * @returns hash string
  */
-
+import {sha256} from 'hash-wasm';
+import { SystemInfo } from './types';
+export async function generateId(systemInfo:SystemInfo):Promise<string>{
+ 	// Generate a hash from the system info to identify the user 
+	// The hash is generated using a stable JSON serialization to ensure consistency
+	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort());
+  	return await sha256(hashInput);	
+}
path: src/hash.ts
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Handle special JSON values
```suggestion
export async function generateId(systemInfo:SystemInfo):Promise<string>{
 	// Generate a hash from the system info to identify the user 
	// The hash is generated using a stable JSON serialization to ensure consistency
	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort(), (key, value) => {
    if (value === undefined) return 'undefined';
    if (value === Infinity) return 'Infinity';
    if (Number.isNaN(value)) return 'NaN';
    return value;
  });
  	return await sha256(hashInput);	
}
```

<!-- manually_applied -->
created_at: 2025-03-27T20:27:09Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,22 @@
+{
+  "name": "fingerprint-oss-test",
+  "version": "0.0.1",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+	"test":"npx playwright test"
+  },
+  "author": "",
+  "license": "BSD-3-Clause",
+  "description": "This project contains tests for fingerprint-oss",
+  "author": "Akshat Kotpalliwar",
path: test/package.json
user: login: codiumai-pr-agent-free[bot]
body: **Suggestion:** Remove duplicate author field
```suggestion
  {
    "name": "fingerprint-oss-test",
    "version": "0.0.1",
    "main": "index.js",
    "type": "module",
    "scripts": {
  	"test":"npx playwright test"
    },
    "license": "BSD-3-Clause",
    "description": "This project contains tests for fingerprint-oss",
    "author": "Akshat Kotpalliwar",
```

<!-- manually_applied -->
created_at: 2025-03-27T20:29:27Z
author_association: CONTRIBUTOR

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-03-18T00:28:37Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

<details>
<summary>📝 Walkthrough</summary>

## Summary by CodeRabbit

- **New Features**
  - Upgraded to version 0.2.4-alpha with enhancements in device fingerprinting, including unique identifier generation and improved hardware concurrency detection.

- **Tests**
  - Introduced an extensive suite of automated tests using Playwright across multiple browsers.

- **Chores**
  - Updated dependencies and streamlined test and workflow configurations for improved automation and reliability.
## Walkthrough
The update introduces a new section in the `CHANGELOG.md` file for version `0.2.4-alpha`, detailing several enhancements. The `estimateCores` function in `src/helper.ts` has been refactored for improved core estimation through concurrent execution. A new asynchronous function `generateId` is added in `src/hash.ts`, which generates a hash from system information. The `generateJSON` function in `src/json.ts` is updated to include a unique identifier. Additionally, multiple test files and configurations have been introduced to support testing functionalities like system info and geolocation.

## Changes

| File                     | Change Summary                                                                 |
|--------------------------|--------------------------------------------------------------------------------|
| CHANGELOG.md             | Added a new section header for version `0.2.4-alpha` before the entry for version `0.2.3`. |
| src/helper.ts            | Modified `estimateCores` function to include early exit conditions, enhanced core estimation logic with concurrent execution, and refined error handling. |
| package.json             | Updated version to `"0.2.4-alpha"` and added a new dependency `"hash-wasm": "^4.12.0"` in the `dependencies` section. |
| src/hash.ts              | Introduced a new asynchronous function `generateId` that generates a hash from `systemInfo`. |
| src/json.ts              | Updated `generateJSON` to be asynchronous and include a `hash` property by calling `generateId`. Added import statement for `generateId`. |
| src/mock.ts              | Added a new property `hash` with value `'5d41402abc4b2a76b9719d911017c592'` in the object returned by `getMockSystemInfo`. |
| test/index.html          | Introduced a new HTML file that runs a script to gather user information using the `fingerprint-oss` library. |
| test/package.json        | Created a new `package.json` for "fingerprint-oss-test" with specified dependencies and test configurations. |
| test/systemInfo.test.js  | Added a new test file to validate fingerprinting functionality using Playwright. |
| test/vite.config.js      | Introduced a new Vitest configuration file for setting up the testing environment. |
| .github/playwright_tests  | Added a new GitHub Actions workflow to automate end-to-end tests using Playwright. |

## Poem
> I'm Bunny, hopping on this code-filled day,  
> A new changelog header is here to stay.  
> Version 0.2.4-alpha takes its rightful space,  
> Awaiting future notes with a gentle embrace.  
> With twitching whiskers, I cheer this change away! 🐰🌟

</details>

<!-- walkthrough_end -->


---

<details>
<summary>📜 Recent review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Free**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between a5d556ee02ca3abf9dd7fb34f420b8fb7b83deb9 and d497dafbca9f001fb193a6d6f5e38779ae907cde.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `src/hash.ts` (1 hunks)
* `src/helper.ts` (2 hunks)

</details>

</details>
<!-- internal state start -->


<!-- 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 -->

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</details>

<!-- tips_end -->
author_association: CONTRIBUTOR
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-18T00:28:45Z
body: ## PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

<table>
<tr><td>⏱️&nbsp;<strong>Estimated effort to review</strong>: 1 🔵⚪⚪⚪⚪</td></tr>
<tr><td>🧪&nbsp;<strong>No relevant tests</strong></td></tr>
<tr><td>🔒&nbsp;<strong>No security concerns identified</strong></td></tr>
<tr><td>⚡&nbsp;<strong>Recommended focus areas for review</strong><br><br>

<details><summary><a href='https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-06572a96a58dc510037d5efa622f9bec8519bc1beab13c9f251e97e657a9d4edR5-R5'><strong>Missing Date</strong></a>

The new version entry for 0.2.4-alpha is missing a release date. Consider adding today's date or "Unreleased" if this version is not yet released.
</summary>

```markdown
## [0.2.4-alpha] - 
```

</details>

</td></tr>
</table>

author_association: CONTRIBUTOR
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-18T00:28:48Z
body: ## PR Code Suggestions ✨
<!-- 3be4f01 -->

Latest suggestions up to 3be4f01

<table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=1>General</td>
<td>



<details><summary>Use feature detection over UA sniffing<!-- not_implemented --></summary>

___


**Avoid using browser detection via user agent strings as it's unreliable and can <br>be spoofed. Instead, use feature detection or capability testing to determine <br>browser behavior differences.**

[src/helper.ts [534-536]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R534-R536)

```diff
-if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
+// Use feature detection instead of browser sniffing
+if (typeof performance.timing !== 'undefined' || typeof window.mozInnerScreenX !== 'undefined') {
   return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
 }
```

- [ ] **Apply this suggestion** <!-- /improve --apply_suggestion=0 -->

<details><summary>Suggestion importance[1-10]: 8</summary>

__

Why: User agent sniffing is considered a poor practice as it's unreliable and easily spoofed. The suggestion correctly replaces UA detection with feature detection, using Firefox-specific property (mozInnerScreenX) and performance timing API checks, which is more robust and future-proof.


</details></details></td><td align=center>Medium

</td></tr>
<tr><td align="center" colspan="2">

- [ ] Update <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

___

#### Previous suggestions


<details><summary>✅ Suggestions up to commit d7cc024</summary>
<br><table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=1>Possible issue</td>
<td>



<details><summary>✅ 
Fix Promise.race syntax error
</summary>

___

<details><summary><b>Suggestion Impact:</b></summary>The commit restructured the Promise.race implementation to fix the syntax error, but with a different approach than suggested. Instead of directly fixing the parentheses, the code was refactored to extract the async function into a separate variable (corePromise) and then use that in the Promise.race call, which effectively resolved the syntax issue.

code diff:

```diff
+    // Immediately invoke the async function so it returns a Promise<number>
+    const corePromise = (async () => {
+      const testConcurrency = Math.min(browserReportedCores * 2, 16);
+      // Create an array of Promises from concurrently running workers
+      const promises = Array.from({ length: testConcurrency }, async () => {
+        const worker = new Worker(workerUrl);
+        workers.push(worker);
+        return new Promise<number>(resolve => {
+          worker.onmessage = (e) => {
+            if (e.data?.duration) {
+              resolve(e.data.duration);
+            }
+          };
+          worker.postMessage('start');
+        });
+      });
+      const allDurations = await Promise.all(promises);
+      // Sort durations to find the median
+      allDurations.sort((a, b) => a - b);
+      const medianDuration = allDurations[Math.floor(allDurations.length / 2)];
+      
+      // Calculate parallel efficiency
+      const singleThreadTime = medianDuration * testConcurrency;
+      const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
+      const efficiency = (singleThreadTime / theoreticalTime) * 100;
+      
+      // Determine core count based on efficiency threshold
+      let coreEstimate = Math.round(
+        (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
+      );
+      
+      // Cross-validation with hardware report
+      coreEstimate = Math.min(
+        Math.max(coreEstimate, browserReportedCores - 2),
+        browserReportedCores + 2
+      );
+      
+      // Architecture‑specific final check
+      return Math.min(Math.max(coreEstimate, 1), 12);
+    })().catch((err: any) => {
+      console.error("Core estimation failed:", err);
+      return browserReportedCores;
+    });
+
+    // Race the core estimation promise against a timeout promise
     const results = await Promise.race([
-      (async () => {
-        const testConcurrency = Math.min(browserReportedCores * 2, 16);
-        const timings: number[] = [];
-        
-        // Run multiple concurrent workers
-        const promises = Array.from({ length: testConcurrency }, async () => {
-          const worker = new Worker(workerUrl);
-          workers.push(worker);
-          
-          return new Promise<number>(resolve => {
-            worker.onmessage = (e) => {
-              if (e.data?.duration) resolve(e.data.duration);
-            };
-            worker.postMessage('start');
-          });
-        });
-
-        const allDurations = await Promise.all(promises);
-        const medianDuration = allDurations.sort()[Math.floor(allDurations.length / 2)];
-        
-        // Calculate parallel efficiency
-        const singleThreadTime = medianDuration * testConcurrency;
-        const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
-        const efficiency = (singleThreadTime / theoreticalTime) * 100;
-        
-        // Determine core count based on efficiency threshold
-        let coreEstimate = Math.round(
-          (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
-        );
-
-        // Cross-validation with hardware report
-        coreEstimate = Math.min(
-          Math.max(coreEstimate, browserReportedCores - 2),
-          browserReportedCores + 2
-        );
-
-        // Architecture-specific final check
-        return Math.min(Math.max(coreEstimate, 1), 12);
-        }).catch(err => {
-          console.error("Core estimation failed:", err);
-          return browserReportedCores;
-        }),
-      })(),
-      new Promise<number>(resolve => 
+      corePromise,
+      new Promise<number>(resolve =>
         setTimeout(() => resolve(browserReportedCores), MAX_TEST_TIME)
       )
     ]);
```

</details>


___


**There's a syntax error in the Promise.race implementation. The extra closing <br>parenthesis and bracket after the catch block creates unbalanced parentheses, <br>which will cause a runtime error. The second argument to Promise.race is also <br>incorrectly formatted.**

[src/helper.ts [483-530]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R483-R530)

```diff
 const results = await Promise.race([
   (async () => {
     const testConcurrency = Math.min(browserReportedCores * 2, 16);
     const timings: number[] = [];
     
     // Run multiple concurrent workers
     const promises = Array.from({ length: testConcurrency }, async () => {
       const worker = new Worker(workerUrl);
       workers.push(worker);
       
       return new Promise<number>(resolve => {
         worker.onmessage = (e) => {
           if (e.data?.duration) resolve(e.data.duration);
         };
         worker.postMessage('start');
       });
     });
 
     const allDurations = await Promise.all(promises);
     const medianDuration = allDurations.sort()[Math.floor(allDurations.length / 2)];
     
     // Calculate parallel efficiency
     const singleThreadTime = medianDuration * testConcurrency;
     const theoreticalTime = medianDuration * (testConcurrency / browserReportedCores);
     const efficiency = (singleThreadTime / theoreticalTime) * 100;
     
     // Determine core count based on efficiency threshold
     let coreEstimate = Math.round(
       (testConcurrency * 100) / Math.max(efficiency, 10) // 10% minimum efficiency floor
     );
 
     // Cross-validation with hardware report
     coreEstimate = Math.min(
       Math.max(coreEstimate, browserReportedCores - 2),
       browserReportedCores + 2
     );
 
     // Architecture-specific final check
     return Math.min(Math.max(coreEstimate, 1), 12);
-    }).catch(err => {
-      console.error("Core estimation failed:", err);
-      return browserReportedCores;
-    }),
-  })(),
+  })().catch(err => {
+    console.error("Core estimation failed:", err);
+    return browserReportedCores;
+  }),
+  new Promise<number>(resolve => 
+    setTimeout(() => resolve(browserReportedCores), MAX_TEST_TIME)
+  )
+]);
```




<details><summary>Suggestion importance[1-10]: 10</summary>

__

Why: This suggestion fixes a critical syntax error in the Promise.race implementation that would cause a runtime error due to unbalanced parentheses. The fix properly structures the Promise.race arguments, which is essential for the core estimation functionality to work correctly.


</details></details></td><td align=center>High

</td></tr><tr><td rowspan=2>General</td>
<td>



<details><summary>✅ 
Remove duplicate author field
</summary>

___


**The <code>author</code> field is duplicated in the package.json file. The first instance is <br>empty while the second contains "Akshat Kotpalliwar". This could cause issues <br>with package metadata and should be consolidated into a single author field.**

[test/package.json [8-12]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-b9188cc104c28fc06ff913ef07a9fa1a038b3f4de944a86c32f85fe3df17efafR8-R12)

```diff
 {
   "name": "fingerprint-oss-test",
   "version": "0.0.1",
   "main": "index.js",
   "type": "module",
   "scripts": {
 	"test":"npx playwright test"
   },
-  "author": "",
   "license": "BSD-3-Clause",
   "description": "This project contains tests for fingerprint-oss",
   "author": "Akshat Kotpalliwar",
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 5</summary>

__

Why: The suggestion removes a duplicate author field in the package.json file, which could cause inconsistencies in package metadata. Having clean and valid package.json metadata is important for proper npm package management and distribution.


</details></details></td><td align=center>Low

</td></tr><tr><td>



<details><summary>Fix inconsistent resolution comment</summary>

___


**There's a mismatch between the expected screen resolution in the test assertion <br>and the comment. The test expects [1280, 720] but the comment mentions <br>1920x1080, which could lead to confusion and potential test failures.**

[test/systemInfo.test.js [35-36]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-01f042eaa212f8d681326ac3b74668db50b1af1d761dc66935833c7c7381b9d7R35-R36)

```diff
 // Validate screen resolution
-expect(testData.systemInfo.screenResolution).toEqual([1280, 720]); // Ensure resolution is 1920x1080
+expect(testData.systemInfo.screenResolution).toEqual([1280, 720]); // Ensure resolution is 1280x720
```

 <!-- /improve --apply_suggestion=2 -->

<details><summary>Suggestion importance[1-10]: 3</summary>

__

Why: The suggestion corrects a mismatch between the test assertion (1280x720) and the comment (1920x1080). While this doesn't affect code functionality, it improves code clarity and prevents confusion for developers maintaining the tests.


</details></details></td><td align=center>Low

</td></tr>
<tr><td align="center" colspan="2">

 <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

</details>
<details><summary>✅ Suggestions up to commit 6fd761d</summary>
<br><table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=2>Possible issue</td>
<td>



<details><summary>✅ 
Add Promise rejection handling
</summary>

___


**The code is returning a value inside a Promise.race() but doesn't handle the <br>case where the Promise.race() might reject. Add proper error handling to ensure <br>the function always returns a valid core count.**

[src/helper.ts [520-521]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R520-R521)

```diff
 // Architecture-specific final check
 return Math.min(Math.max(coreEstimate, 1), 12);
+}).catch(err => {
+  console.error("Core estimation failed:", err);
+  return browserReportedCores;
+}),
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 8</summary>

__

Why: The suggestion identifies a critical error handling issue where Promise rejection in the estimateCores function could cause the function to fail without returning a valid value. Adding proper error handling ensures the function always returns a valid core count even when the Promise.race() rejects.


</details></details></td><td align=center>Medium

</td></tr><tr><td>



<details><summary>✅ 
Handle special JSON values
</summary>

___


**The current implementation of <code>generateId</code> may cause inconsistent hashes if the <br><code>systemInfo</code> object contains circular references or special JavaScript values like <br><code>undefined</code>, <code>NaN</code>, or <code>Infinity</code> which are not properly handled by <code>JSON.stringify()</code>. <br>Consider adding a custom replacer function to handle these cases.**

[src/hash.ts [8-13]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-4f8b081124d546c170bed63dd8f10d396c06db19f1c65ce5d41c8cc801fd51e2R8-R13)

```diff
 export async function generateId(systemInfo:SystemInfo):Promise<string>{
  	// Generate a hash from the system info to identify the user 
 	// The hash is generated using a stable JSON serialization to ensure consistency
-	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort());
+	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort(), (key, value) => {
+    if (value === undefined) return 'undefined';
+    if (value === Infinity) return 'Infinity';
+    if (Number.isNaN(value)) return 'NaN';
+    return value;
+  });
   	return await sha256(hashInput);	
 }
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 7</summary>

__

Why: This suggestion addresses a potential issue with JSON serialization of special JavaScript values that could lead to inconsistent hash generation. Adding a custom replacer function improves the robustness of the hash generation by properly handling undefined, NaN, and Infinity values.


</details></details></td><td align=center>Medium

</td></tr><tr><td rowspan=1>General</td>
<td>



<details><summary>Fix inconsistent test comment</summary>

___


**There's a mismatch between the assertion comment and the actual expected value. <br>The comment says "Ensure resolution is 1920x1080" but the test is checking for <br>[1280, 720]. Update either the comment or the expected value to be consistent.**

[test/systemInfo.test.js [35-36]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-01f042eaa212f8d681326ac3b74668db50b1af1d761dc66935833c7c7381b9d7R35-R36)

```diff
 // Validate screen resolution
-expect(testData.systemInfo.screenResolution).toEqual([1280, 720]); // Ensure resolution is 1920x1080
+expect(testData.systemInfo.screenResolution).toEqual([1280, 720]); // Ensure resolution is 1280x720
```

 <!-- /improve --apply_suggestion=2 -->

<details><summary>Suggestion importance[1-10]: 3</summary>

__

Why: The suggestion correctly identifies a mismatch between the test assertion and its comment. While this doesn't affect functionality, fixing the comment improves code readability and prevents confusion for developers maintaining the tests.


</details></details></td><td align=center>Low

</td></tr>
<tr><td align="center" colspan="2">

 <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

</details>
<details><summary>✅ Suggestions up to commit 7d6e998</summary>
<br><table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=3>Possible issue</td>
<td>



<details><summary>✅ 
Ensure consistent hash generation
</summary>

___


**Using <code>Object.values()</code> on complex objects like <code>systemInfo</code> can lead to <br>inconsistent hashes because object property order isn't guaranteed in <br>JavaScript, and nested objects will be stringified as "[object Object]". <br>Consider using a more deterministic approach to serialize the object.**

[src/hash.ts [8-13]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-4f8b081124d546c170bed63dd8f10d396c06db19f1c65ce5d41c8cc801fd51e2R8-R13)

```diff
 export async function generateId(systemInfo:SystemInfo):Promise<string>{
  	// Generate a hash from the system info to identify the user 
-	// The hash is generated by concatenating all the values of the systemInfo object and then hashing the resulting string
-	const hashInput = Object.values(systemInfo).join('|');
+	// The hash is generated using a stable JSON serialization to ensure consistency
+	const hashInput = JSON.stringify(systemInfo, Object.keys(systemInfo).sort());
   	return await sha256(hashInput);	
 }
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 9</summary>

__

Why: This suggestion addresses a serious issue with the hash generation logic. Using Object.values() can produce inconsistent hashes due to non-guaranteed property order, which could break user identification. The proposed solution using sorted keys ensures deterministic hash generation.


</details></details></td><td align=center>High

</td></tr><tr><td>



<details><summary>✅ 
Prevent negative core count
</summary>

___


**The code doesn't handle the case where <code>coreEstimate</code> could be negative or zero <br>due to the efficiency calculation. This could happen if the efficiency value <br>becomes extremely high. Add a minimum value check to ensure a reasonable core <br>count is always returned.**

[src/helper.ts [520-521]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R520-R521)

```diff
 // Architecture-specific final check
-return Math.min(coreEstimate, 12);
+return Math.min(Math.max(coreEstimate, 1), 12);
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 8</summary>

__

Why: The suggestion addresses a critical issue where the core estimation could return negative or zero values due to the efficiency calculation, which would cause functional problems. Adding a minimum value check ensures the function always returns a valid core count.


</details></details></td><td align=center>Medium

</td></tr><tr><td>



<details><summary>Fix deprecated API usage<!-- not_implemented --></summary>

___


**Using <code>performance.timing</code> is problematic as it's deprecated and may return <br><code>undefined</code>. The <code>performance.timing?.navigationStart</code> check might not work as <br>expected in modern browsers. Consider using a more reliable feature detection <br>method.**

[src/helper.ts [530-532]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R530-R532)

```diff
-if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
+if (navigator.userAgent.includes('Firefox') || (typeof performance !== 'undefined' && 'timing' in performance)) {
   return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
 }
```

 <!-- /improve --apply_suggestion=2 -->

<details><summary>Suggestion importance[1-10]: 7</summary>

__

Why: The suggestion correctly identifies that performance.timing is deprecated and may cause issues in modern browsers. The improved code provides a more reliable feature detection method that will prevent potential runtime errors.


</details></details></td><td align=center>Medium

</td></tr>
<tr><td align="center" colspan="2">

 <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

</details>
<details><summary>✅ Suggestions up to commit 5cea5e8</summary>
<br><table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=1>Possible issue</td>
<td>



<details><summary>✅ 
Missing await for Promise
</summary>

___


**The <code>sha256</code> function returns a Promise, but you're not awaiting it. This will <br>cause the function to return a Promise object instead of the hash string.**

[src/hash.ts [8-13]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-4f8b081124d546c170bed63dd8f10d396c06db19f1c65ce5d41c8cc801fd51e2R8-R13)

```diff
 export async function generateId(systemInfo:SystemInfo):Promise<string>{
  	// Generate a hash from the system info to identify the user 
 	// The hash is generated by concatenating all the values of the systemInfo object and then hashing the resulting string
 	const hashInput = Object.values(systemInfo).join('|');
-  	return sha256(hashInput);	
+  	return await sha256(hashInput);	
 }
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 9</summary>

__

Why: The suggestion correctly identifies a critical bug where the sha256 function returns a Promise that isn't being awaited, which would cause the function to return a Promise object instead of the resolved hash string. This would likely cause runtime errors when consumers try to use the hash value.


</details></details></td><td align=center>High

</td></tr><tr><td rowspan=1>General</td>
<td>



<details><summary>✅ 
Unrealistic mock data
</summary>

___


**The mock system info includes a hardcoded hash value 'test', but this doesn't <br>match the hash that would be generated by the <code>generateId</code> function. Consider <br>using a realistic hash value or removing it from the mock data since the hash <br>should be generated dynamically.**

[src/mock.ts [48-49]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-d01d9571cf5ced7e18eb8dce2251999d520ecd26469629223f8cea0aae20374bR48-R49)

```diff
 confidenceScore: 0.85,
-hash: 'test'
+// Hash will be generated dynamically by generateId function
+hash: '5d41402abc4b2a76b9719d911017c592'
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 4</summary>

__

Why: The suggestion correctly identifies that the mock data uses a simplistic 'test' value for the hash property, which doesn't match what would be generated by the new generateId function. While this won't cause functional issues, using a more realistic hash value would improve test fidelity.


</details></details></td><td align=center>Low

</td></tr>
<tr><td align="center" colspan="2">

 <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

</details>
<details><summary>Suggestions</summary>
<br><table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=1>General</td>
<td>



<details><summary>✅ 
Avoid browser detection
</summary>

___

<details><summary><b>Suggestion Impact:</b></summary>The commit implemented the suggestion by adding the feature detection check 'performance.timing?.navigationStart' alongside the Firefox user agent check, exactly as suggested in the code diff.

code diff:

```diff
+    // Final adjustment for certain browsers
     if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
-      return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
+      return Math.min(results, 8);
     }
```

</details>


___


**The browser detection using <code>navigator.userAgent.includes('Firefox')</code> is <br>unreliable as user agents can be spoofed. Consider using feature detection <br>instead of browser detection for more reliable cross-browser compatibility.**

[src/helper.ts [529-531]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R529-R531)

```diff
-if (navigator.userAgent.includes('Firefox')) {
-  return Math.min(results, 8); // Firefox often shows +1 core
+// Use feature detection or capability testing instead of browser detection
+if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
+  return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
 }
```

 <!-- /improve --apply_suggestion=0 -->

<details><summary>Suggestion importance[1-10]: 5</summary>

__

Why: The suggestion correctly identifies that browser detection via user agent is unreliable due to potential spoofing. However, the proposed solution still uses user agent checking and adds a feature detection that doesn't necessarily correlate with Firefox's core reporting behavior, making it only a moderate improvement.


</details></details></td><td align=center>Low

</td></tr>
<tr><td align="center" colspan="2">

 <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>

</details
author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-24T22:05:36Z
body: /improve

author_association: OWNER
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-24T22:06:17Z
body: ## PR Code Suggestions ✨

<!-- f4a5d68 -->

<table><thead><tr><td><strong>Category</strong></td><td align=left><strong>Suggestion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </strong></td><td align=center><strong>Impact</strong></td></tr><tbody><tr><td rowspan=1>General</td>
<td>



<details><summary>✅ 
Avoid browser detection
</summary>

___


**The browser detection using <code>navigator.userAgent.includes('Firefox')</code> is <br>unreliable as user agents can be spoofed. Consider using feature detection <br>instead of browser detection for more reliable cross-browser compatibility.**

[src/helper.ts [529-531]](https://github.com/IntegerAlex/fingerprint-oss/pull/28/files#diff-a09b7f67f5f992f7ef9d9299f6fac774fb218572c9c2960eb2c30293067a8843R529-R531)

```diff
-if (navigator.userAgent.includes('Firefox')) {
-  return Math.min(results, 8); // Firefox often shows +1 core
+// Use feature detection or capability testing instead of browser detection
+if (navigator.userAgent.includes('Firefox') || performance.timing?.navigationStart) {
+  return Math.min(results, 8); // Adjust for browsers with potential core reporting differences
 }
```

`[Suggestion has been applied]`

<details><summary>Suggestion importance[1-10]: 5</summary>

__

Why: The suggestion correctly identifies that browser detection via user agent is unreliable due to potential spoofing. However, the proposed solution still uses user agent checking and adds a feature detection that doesn't necessarily correlate with Firefox's core reporting behavior, making it only a moderate improvement.


</details></details></td><td align=center>Low

</td></tr>
<tr><td align="center" colspan="2">

- [ ] More <!-- /improve --more_suggestions=true -->

</td><td></td></tr></tbody></table>


author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T14:39:12Z
body: /improve
author_association: OWNER
user: login: IntegerAlex
created_at: 2025-03-27T15:01:22Z
body: @CodiumAI-Agent /review
author_association: OWNER
user: login: QodoAI-Agent
created_at: 2025-03-27T15:02:02Z
body: **[Persistent review](https://github.com/IntegerAlex/fingerprint-oss/pull/28#issuecomment-2731262520)** updated to latest commit https://github.com/IntegerAlex/fingerprint-oss/commit/5cea5e894e68e79d0afd214a5982b599c0134a0a
author_association: NONE
user: login: IntegerAlex
created_at: 2025-03-27T20:33:01Z
body: @coderabbitai generate docstrings
author_association: OWNER
user: login: coderabbitai[bot]
created_at: 2025-03-27T20:33:07Z
body: > [!WARNING]
> Docstrings generation is only available on the Pro tier.
author_association: CONTRIBUTOR
user: login: coderabbitai[bot]
created_at: 2025-03-27T20:33:11Z
body: <!-- This is an auto-generated reply by CodeRabbit -->
Your organization has reached its limit of developer seats under the Pro Plan. In order to use the Chat feature, you need to buy additional seats
author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T20:39:58Z
body: @coderabbitai generate docstrings
author_association: OWNER
user: login: coderabbitai[bot]
created_at: 2025-03-27T20:40:04Z
body: > [!WARNING]
> Docstrings generation is only available on the Pro tier.
author_association: CONTRIBUTOR
user: login: coderabbitai[bot]
created_at: 2025-03-27T20:40:06Z
body: <!-- This is an auto-generated reply by CodeRabbit -->
Your organization has reached its limit of developer seats under the Pro Plan. In order to use the Chat feature, you need to buy additional seats
author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T20:45:22Z
body: /help "Update CHANGELOG.md"
author_association: OWNER
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-27T20:45:37Z
body: ### Question: 
Update CHANGELOG.md

### Answer:
The `/update_changelog` tool automatically updates the CHANGELOG.md file with your PR changes. 

To use it, simply comment `/update_changelog` on your PR. The tool will analyze your PR changes and generate appropriate entries for your CHANGELOG.md file.

By default, the tool will only print the suggested changes without actually pushing them. If you want to automatically push the changes to your CHANGELOG.md file, you'll need to set `push_changelog_changes=true` in your configuration.

You can also provide extra instructions to customize how the changelog is updated, for example: `/update_changelog --pr_update_changelog.extra_instructions="Focus on feature X changes"`.

The tool supports adding PR links to the changelog entries (enabled by default).

#### Relevant Sources:

> - https://qodo-merge-docs.qodo.ai//tools/update_changelog#overview
> - https://qodo-merge-docs.qodo.ai//tools/update_changelog#example-usage
> - https://qodo-merge-docs.qodo.ai//tools/update_changelog#configuration-options

author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T20:46:14Z
body: /update_changelog
author_association: OWNER
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-27T20:46:27Z
body: **Changelog updates:** 🔄

## [0.2.4-alpha][*] - 2025-03-27

### Added
- Hash implementation for unique device identification
- Improved hardware concurrency detection with enhanced reliability
- Added initial test framework for system fingerprinting validation

[*]: https://github.com/IntegerAlex/fingerprint-oss/pull/28


>to commit the new content to the CHANGELOG.md file, please type:
>'/update_changelog --pr_update_changelog.push_changelog_changes=true'

author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T20:49:29Z
body: /update_changelog --pr_update_changelog.push_changelog_changes=true --pr_update_changelog.extra_instructions="Fix whole CHANGELOG.md
author_association: OWNER
user: login: IntegerAlex
created_at: 2025-03-27T23:46:55Z
body: /improve
author_association: OWNER
user: login: IntegerAlex
created_at: 2025-03-27T23:47:18Z
body: @coderabbitai fullreview 
author_association: OWNER
user: login: coderabbitai[bot]
created_at: 2025-03-27T23:47:24Z
body: <!-- This is an auto-generated reply by CodeRabbit -->
Your organization has reached its limit of developer seats under the Pro Plan. In order to use the Chat feature, you need to buy additional seats
author_association: CONTRIBUTOR
user: login: IntegerAlex
created_at: 2025-03-27T23:50:18Z
body: 
/update_changelog


author_association: OWNER
user: login: codiumai-pr-agent-free[bot]
created_at: 2025-03-27T23:50:30Z
body: **Changelog updates:** 🔄

## [0.2.4-alpha][*] - 2025-03-27

### Added
- Hash implementation for generating unique device identifiers
- Improved hardware concurrency detection with enhanced reliability
- Added test suite with Playwright for automated testing

[*]: https://github.com/IntegerAlex/fingerprint-oss/pull/28


>to commit the new content to the CHANGELOG.md file, please type:
>'/update_changelog --pr_update_changelog.push_changelog_changes=true'

author_association: CONTRIBUTOR