Cookies Policy
A complete list of the cookies and browser storage used by concreef.eu, what each one is for, how long it lasts, and how to control the non-essential ones.
Updated
Initial version, pending legal review. This policy reflects what the site stores today. It has not yet been reviewed by an external lawyer and will be updated after that review.
What this covers
This page explains everything concreef.eu stores in or reads from your browser — cookies, local storage and session storage — and what you can do about it. It sits alongside our Privacy Policy, which explains what we do with personal data once it reaches us.
Two categories matter:
- Essential items are needed to make the site work — mainly to keep you signed in. We do not need your consent for these, but we also cannot switch them off without breaking the feature they support.
- Non-essential items are for measurement and marketing. They are loaded only after you consent, and you can withdraw that consent at any time.
What is actually stored
| Name / key | Type | Set by | Purpose | Lifetime |
|---|---|---|---|---|
better-auth.session_token, and __Secure-better-auth.session_token in production | Cookie (HTTP-only, Secure in production, SameSite=Lax) | concreef.eu | Essential. Keeps you signed in to your account. Contains a random session token, not your data. | Expires with the session (by default 7 days, refreshed while you stay active); deleted when you sign out |
better-auth.* supporting cookies (e.g. CSRF and OAuth state during Google or GitHub sign-in) | Cookie | concreef.eu | Essential. Protects the sign-in flow against cross-site request forgery and completes the redirect back from the sign-in provider. | The state cookies last minutes, only for the duration of the sign-in |
concreef-consent | Local storage | concreef.eu | Essential. Records your cookie choice and when you made it, so you are not asked again and so non-essential tools stay switched off until you allow them. | Until you clear your browser storage |
concreef-theme | Local storage | concreef.eu | Essential preference. Remembers whether you chose the light or dark theme so the page does not flash on load. Never sent to our servers. | Until you clear your browser storage |
concreef-attribution | Session storage | concreef.eu | Essential for the contact form. Holds the first page of your visit, the referring site and any UTM parameters in the link you followed, so that an enquiry you send carries its source. Not a cookie; never shared with third parties. | Cleared when you close the browser tab |
_ga | Cookie (Google Analytics 4) | .concreef.eu | Non-essential — consent required. Distinguishes one browser from another so visits can be counted. | Up to 2 years |
_ga_<measurement id> | Cookie (Google Analytics 4) | .concreef.eu | Non-essential — consent required. Keeps the analytics session state for the GA4 property. The suffix is the measurement ID, not the tag manager container ID. | Up to 2 years |
_clck | Cookie (Microsoft Clarity) | .concreef.eu | Non-essential — consent required. Keeps a Clarity identifier for the browser so repeat visits can be recognised. | 1 year |
_clsk | Cookie (Microsoft Clarity) | .concreef.eu | Non-essential — consent required. Groups the page views of a single visit together. | 1 day |
Other tags deployed through container GTM-W429C2MV | Cookie or local storage | Google Tag Manager | Non-essential — consent required. Google Tag Manager is a container: it does not itself store analytics data, but it can deploy measurement or advertising tags. Where we add one, it appears in this table. | Varies by tag |
Two separate measurement tools run on this site, and neither is deployed through Google Tag Manager. Google Analytics 4 counts visits and pages; Microsoft Clarity records how pages are used, including mouse movement, scrolling and clicks, which can be replayed as an anonymised session. Both load from our own code, and both only after you consent. Google Tag Manager is present as a container but currently deploys no measurement tag of its own; if we ever add one it will appear in this table.
Clarity means your interactions with the page are processed by Microsoft, including outside the European Union. Microsoft masks text content by default, so what you type into a form is not captured. Their descriptions are published in the Microsoft Clarity privacy notice and Google's in the Google Analytics cookie usage documentation.
Consent
Non-essential scripts — Google Analytics and Microsoft Clarity — load only after you have given consent. Until you consent, no analytics cookie is set and neither Google Analytics nor Microsoft Clarity is loaded or contacted. One request is made regardless of your choice: the Google Tag Manager container script itself. It holds no measurement tag today, so it stores nothing and reports nothing, but the request to Google is made and we would rather say so than imply otherwise.
You can change your mind at any time:
- Withdraw or change consent using the cookie settings on this site.
- Delete the cookies already set from your browser settings.
- Block cookies entirely in your browser. Blocking the essential session cookie will prevent you from signing in; everything else on the site will still work.
Withdrawing consent stops future collection. It does not undo data already collected, though you can ask us to delete that too — see the rights section of the Privacy Policy.
Third-party sign-in
If you sign in with Google or GitHub, that provider will set its own cookies on its own domain during the sign-in. Those cookies are controlled by the provider under its own cookie and privacy policies, not by us.
Browser controls
Every major browser lets you view, delete and block cookies and clear site storage:
- Chrome: Settings → Privacy and security → Third-party cookies / Site data
- Firefox: Settings → Privacy & Security → Cookies and Site Data
- Safari: Settings → Privacy → Manage Website Data
- Edge: Settings → Cookies and site permissions
Changes
We will update this page whenever we add, remove or change what the site stores in your browser. The date at the top shows the current version.
Questions: info@concreef.eu, Concreef, 95 Doctor G. M. Dimitrov Blvd., Studentski Kompleks, 1700 Sofia, Bulgaria.