Cookie Policy
Last updated: March 26, 2026
1. What Are Cookies
Cookies are small text files stored on your device when you visit a website. They help the website remember your preferences and provide essential functionality.
2. Cookies We Use
FIRVO uses a minimal number of cookies. We divide them into two categories:
- Essential — required for the Platform to function (authentication, language, cookie choice). Always active.
- Analytics — help us understand how users interact with the Platform (PostHog, Microsoft Clarity). Set ONLY after your consent.
We do not use any advertising cookies.
| Cookie Name | Type | Purpose | Duration | Party |
|---|---|---|---|---|
| sb-*-auth-token | Strictly necessary | Authentication session — keeps you logged in across page loads. Contains an encrypted JWT token managed by Supabase. HttpOnly (not readable by JavaScript). | Session | First-party |
| firvo-language | Functional | Stores your language preference (English or Polish) so the Platform displays in the correct language on each visit. | 1 year | First-party |
| firvo-consent | Strictly necessary | Stores your cookie decision ("all" or "necessary") so the banner is not shown again. | 1 year | First-party |
| The following cookies are set ONLY after you consent to analytics cookies: | ||||
| _clck, _clsk | Analytics | Microsoft Clarity — session recordings and heatmaps. Helps us understand how users interact with the Platform. Does not collect personal data. | 1 year | Third-party (Microsoft) |
| MUID | Analytics | Microsoft Clarity — user identifier for session analysis. Set automatically by Clarity. | 13 months | Third-party (Microsoft) |
3. Local Storage
In addition to cookies, we use browser local storage for the following purposes:
| Key | Purpose | Duration |
|---|---|---|
| firvo-language | Your explicit language choice (overrides the cookie when you manually change language) | Permanent (until cleared) |
| theme | Your theme preference (dark or light mode) | Permanent (until cleared) |
4. Third-Party Cookies
After consenting to analytics cookies, FIRVO uses the following third-party services:
- PostHog (EU hosted) — platform usage analytics. Configured with
persistence: "memory"— does not set cookies, data is stored only in browser memory and cleared when the tab is closed. - Microsoft Clarity — session recordings and heatmaps. Sets cookies
_clck,_clsk,MUID. Governed by Microsoft's Privacy Policy.
We do not use Google Analytics, Facebook Pixel, or any advertising services.
When you make a payment, Stripe's payment form (loaded in a secure iframe) may set its own cookies as required for fraud prevention. These are governed by Stripe's Privacy Policy.
5. Cookie Consent Banner
On your first visit, we display a cookie consent banner. You can choose:
- "Necessary only" — only cookies required for the site to function are enabled (authentication, language, cookie choice). No analytics tools are loaded.
- "Accept all" — analytics cookies are additionally enabled (PostHog and Microsoft Clarity) to help us improve the Platform.
Your choice is stored in the firvo-consent cookie for 1 year. You can change your decision at any time by clearing your browser cookies.
6. How to Manage Cookies
You can control cookies through your browser settings:
- Chrome: Settings → Privacy and security → Cookies
- Firefox: Settings → Privacy & Security → Cookies
- Safari: Preferences → Privacy → Manage Website Data
- Edge: Settings → Cookies and site permissions
Please note that blocking the authentication cookie will prevent you from logging in.
7. Changes to This Policy
If we introduce new types of cookies (e.g., analytics), we will update this policy and implement a cookie consent mechanism before doing so.
8. Contact
For questions about our use of cookies: