Cookies and browser storage
PerfLab is operated by the Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czechia. Contact perflab@isibrno.cz with questions about this policy.
For account information, research uploads, retention and your data protection rights, read the Privacy notice.
Necessary cookies provide sign-in, session continuity and form security. Optional browser storage remembers your preferences only after you accept it. We do not use analytics, advertising cookies or third-party tracking services.
What is stored
| Name | Purpose | Duration | Choice |
|---|---|---|---|
| perflab_session | First-party session, sign-in and application state | 120 minutes of inactivity | Necessary |
| XSRF-TOKEN | Protect forms against cross-site request forgery | Same as the session | Necessary |
| perflab_cookie_preferences | Remember your consent choice, policy version and decision time | 365 days | Necessary |
| theme | Local storage: remember your selected appearance | Until withdrawal or browser-data deletion; cleared on the next visit after consent expires | Optional preferences |
Your choices
Optional preferences are off until you choose to accept them. Accept optional enables remembered preferences; Reject optional keeps them off. Settings lets you choose explicitly. Closing the settings dialog or continuing to browse does not give consent. All choices last for the same period.
You can reopen Cookie settings at any time using the footer or user menu. Switch off Remember preferences and save, or choose Reject optional, to withdraw consent and clear the optional values. Sign-in, analysis tools, theme switching and the game continue to work; preferences will not be remembered across visits.
The theme value remains in your browser and is not sent to another service. Game scores are stored in your account in the database, not in optional browser storage. You can also delete cookies and local storage through your browser; deleting necessary cookies may sign you out.