1. Data Controller

The controller of your personal data is the owner of the VocabuLit application – Krzysztof Krysztofczyk (contact: [email protected]).

2. What data we collect

• Account data – email, nickname, preferred language.
• Learning materials – books, words, sentences, translations, and your answers during study sessions.
• Analytical data – server logs, learning progress, cookie identifiers, statistics from tools like Google Analytics, Hotjar, etc.
• Firefox extension data – the optional VocabuLit New Tab extension may read account data and learning materials listed above through your existing vocabulit.com session. The extension does not add new categories of account data.

3. Purposes and legal basis for processing

• Performance of an online services contract (Art. 6(1)(b) GDPR).
• Statistics and service improvement – our legitimate interest (Art. 6(1)(f) GDPR).
• Sending email notifications (password reset, updates) – legitimate interest.
• Accounting or tax obligations (if payments are introduced) – legal obligation.

4. Data retention period

We retain your account data until you delete your account or for 6 months from your last login. Backup data is erased within 30 days thereafter.

5. Data sharing

• Hosting and email providers (e.g. Azure, SendGrid).
• AI/translation providers (e.g. OpenAI) – only the content of submitted sentences; never your email.
• Analytics tools (Google Analytics, Hotjar) – pseudonymous cookie identifiers.
• Public authorities – only when required by law.

6. Cookies and analytics

The service uses cookies for the following purposes:

1. maintaining login sessions,
2. collecting anonymous statistics (Google Analytics, Hotjar),
3. allowing the optional VocabuLit Firefox extension to authenticate book-list requests using your existing vocabulit.com session cookie.

You can manage cookies in your browser settings.

7. Your rights

• access to your data,
• rectification,
• erasure (“right to be forgotten”),
• restriction of processing,
• objection to processing based on legitimate interest,
• complaint to the Data Protection Authority.

8. Security

We use TLS encryption, regular backups, and restrict data access to authorized personnel only.

9. Changes to this document

Updates to this policy will be published on this page; significant changes will be communicated by email. This update adds information about the optional VocabuLit Firefox extension.

10. VocabuLit Firefox extension

VocabuLit offers an optional Firefox extension called “VocabuLit New Tab”. The extension replaces Firefox's new-tab page with vocabulary from one of your VocabuLit books.

What the extension accesses.

• When you ask it to list your books, the extension reads your VocabuLit book list using the login session already present in your Firefox browser for vocabulit.com.
• When you choose a book for the extension, VocabuLit may create or reuse a wallpaper link for that book so the extension can load the selected vocabulary wallpaper.
• For the selected book, the extension loads the wallpaper data: book title, up to three words, translations, and example sentences.

What the extension stores locally.

• the selected wallpaper link,
• the most recently loaded words as a local cache,
• display preferences such as sentence visibility and refresh interval.

This local data is stored inside Firefox extension storage on your device. Removing the extension removes its locally stored extension data.

What the extension does not do.

• It does not store your VocabuLit password.
• It does not store your VocabuLit session cookie.
• It does not send extension data to third parties.
• It does not include analytics, tracking, or telemetry of its own.
• It does not work on or read websites other than vocabulit.com.

In Firefox's data-collection declaration, the extension declares the “Website content” data type because it reads VocabuLit book-list and wallpaper content associated with your account through your existing vocabulit.com session.

11. Contact

To exercise your rights or ask questions, contact us at [email protected].