Last updated: June 2026
🔒 Privacy Policy
How NextSem collects, uses, and protects your information.
📋 Overview
Welcome to NextSem ("we", "us", or "our"). We operate the website nodejs-by-nextsem.web.app. This Privacy Policy explains how we handle your information when you use our platform. We are committed to protecting your privacy.
📦 Information We Collect
We may collect the following types of information:
- Account information: When you sign up, we collect your name, email address, and authentication data via Firebase Authentication.
- Usage data: Lesson progress and completed modules are stored in Firebase Firestore.
- Device information: Browser type, device type, IP address (collected automatically by hosting and analytics services).
- Cookies: Used by Google AdSense and Google Analytics to serve personalized ads and measure traffic.
📢 Google AdSense & Advertising
We use Google AdSense to display advertisements on our site. Google AdSense may use cookies and web beacons to serve ads based on your prior visits to this website and other websites.
Google's use of advertising cookies enables it and its partners to serve ads based on your visit to NextSem and/or other sites on the internet. You may opt out of personalized advertising by visiting
Google Ads Settings.
We are a participant in the Google AdSense program. The ca-pub-4242865347895866 publisher ID identifies our account.
🔥 Firebase Services
NextSem uses the following Google Firebase services:
- Firebase Authentication – to manage user sign-in securely.
- Cloud Firestore – to store your learning progress.
- Firebase Hosting – to serve this website.
- Firebase Analytics – to understand how users interact with the site.
Firebase is governed by Google's Privacy Policy.
🍪 Cookies Policy
We use cookies for the following purposes:
- Essential cookies: Required for user authentication and session management.
- Advertising cookies: Used by Google AdSense to deliver relevant ads.
- Analytics cookies: Used by Firebase Analytics to measure site usage.
You can control cookie settings through your browser settings or via the consent banner shown to EU/UK users.
🛡️ How We Use Your Data
- To provide and maintain your account and learning progress
- To display personalized or contextual advertising
- To analyze usage and improve our platform
- To send important service-related communications
We do not sell your personal data to third parties.
🌍 GDPR & User Rights (EU/UK/EEA)
If you are located in the EU, UK, or Switzerland, you have the following rights under GDPR:
- Right to access your personal data
- Right to delete your account and data
- Right to correct inaccurate data
- Right to withdraw consent for advertising cookies
- Right to data portability
To exercise any of these rights, contact us.
🔐 Data Security
We use industry-standard security practices including HTTPS encryption, Firebase security rules, and secure authentication. However, no internet transmission is 100% secure.
👶 Children's Privacy
NextSem is not directed to children under 13. We do not knowingly collect personal information from children. If you believe a child has provided us data, please contact us and we will delete it immediately.
✉️ Contact Us
If you have any questions about this Privacy Policy, please reach out: