Legal information
Cookie Policy
Version 1 — in force since 19 Sep 2026
Essential, analytics and marketing cookies subject to consent.
Technical list of cookies
This list is generated from the platform’s code: it shows every cookie actually set, its category and its lifetime.
| Name | Category | Purpose | Lifetime |
|---|---|---|---|
fs_session |
Strictly necessary | Keeps you logged in, cart, anti-CSRF token | Session |
fs_consent |
Strictly necessary | Remembers your tracking choices | 180 days |
fs_lang |
Strictly necessary | Display language | 365 days |
fs_theme |
Strictly necessary | Light or dark theme | 365 days |
fs_v |
Strictly necessary | Displayed language and currency, to quickly serve the right version of public pages | 30 days |
fs_ann |
Strictly necessary | Announcements already dismissed | 30 days |
fs_dvc |
Strictly necessary | Trusted device (account security, anti-sharing) | 400 days |
fs_dev |
Strictly necessary | Anti-abuse marker for free trials | 365 days |
fs_ab |
Audience measurement (consent) | Variant assigned in an A/B test | 180 days |
fs_ref |
Marketing and affiliation (consent) | Referral attribution | 60 days |
fs_aff |
Marketing and affiliation (consent) | Attribution of a sale to an affiliate partner | 90 days |
A/B tests (prices, sales pages, thumbnails)
To improve its offers, the platform may show some visitors a variant of a course: another price, another title or another thumbnail. The variant is drawn at random, possibly within a segment (new or existing customers, country, device, language), and stays the same for you on all your devices when you are signed in. The price shown is always the price you pay, and no strikethrough price is ever shown for a test price.
If you are not signed in, a “fs_ab” cookie holding a random identifier is set for 180 days, only if you accepted audience measurement. Withdrawing this consent deletes the cookie.
Legal basis: consent for the cookie, legitimate interest for signed-in accounts; you can object by refusing profiling in My account › Privacy. Assignments and measurements are deleted 12 months after each test ends; only aggregated results are kept.