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Cookies

Which cookies the site uses, why, and how to opt out.

Last updated: 26 May 2026.

1. What a cookie is

A cookie is a tiny piece of data that a site writes into your browser to remember your choices and measure traffic. Technically it is just a string with a name, a value, and an expiry time.

2. What ksim.pro sets

The site itself sets a minimum of cookies. Most are placed by the third-party services described in the privacy policy.

Functional (needed for the site to work)

  • lang - remembers your RU/EN choice after you click the language switcher. Lifetime: 1 year. Without it the switcher works once per visit.

Analytics (show which pages are useful)

  • _ym_uid, _ym_d, _ym_isad, _ym_visorc_* - Yandex.Metrika. Visitor identifier, session markers, WebVisor data. Lifetime: up to 1 year.
  • _ga, _ga_*, _gid - Google Analytics 4. Anonymous visitor and session identifiers. Lifetime: 24 hours to 2 years.

Security (form anti-bot)

  • cf_chl_*, __cf_bm and related Cloudflare Turnstile cookies. Set only if you interact with the captcha widget on the contact form. Short-lived: session or a few days.

3. How to opt out

The universal route is browser settings. In most browsers you can:

  • Block third-party cookies entirely.
  • Block cookies for a specific domain.
  • Use private or incognito browsing.
  • Install a tracker-blocking extension (uBlock Origin, Privacy Badger and the like).

Service-specific opt-outs: Yandex.Metrika has an opt-out page; Google Analytics has a browser add-on.

After opting out the site keeps working. Without the lang cookie the language preference does not persist between visits - you would pick it every time.

4. No cookie banner

The site does not show a classic cookie banner. The reason is that it carries no advertising or retargeting cookies, and the cookies that are present are processed under legitimate interest and the consent you express by action. If you do not want cookies, use the mechanisms in section 3.

5. Changes

If the set of cookies or services changes, this page is updated and the date at the top moves with it.