Cookie Policy

Last updated: 17 September 2026

This policy explains how mathiasholmgren.com ("the Site") uses cookies and similar technologies. It supplements our Privacy Policy.

What cookies are

Cookies are small files stored on your device when you visit a website. Similar technologies (such as local storage) work the same way. We use them to run the Site, keep it secure, and — with your consent — to understand and improve how it is used.

Your consent

Strictly necessary cookies are set automatically because the Site cannot work without them. All other cookies are set only after you agree through our cookie banner. You can change or withdraw your choice at any time via the cookie settings on this site or your browser settings.

Cookies we use

Strictly necessary

Required to deliver the Site securely. Exempt from consent.

• _cfuvid (Cloudflare) — distinguishes and rate-limits requests to protect the Site; set for security, not tracking. Duration: session.

Analytics and personalization

Set only with your consent.

These entries are set by Webflow Optimize (formerly Intellimize) for personalization and A/B testing. On the Site they assign a persistent visitor identifier and record page views and interactions. They are stored in your browser's local storage, not as cookies; privacy law treats local storage the same way. The 117854051 suffix is the Site's Optimize account ID. Local storage has no expiry date and remains until you clear it.

All of the following are set by Webflow Optimize, stored in local storage, and remain until cleared:

• intellimize_user_117854051 — persistent visitor identifier
• intellimize_attributes_117854051 — visitor attributes tied to the identifier
• intellimize_activity_117854051 — log of page views and interactions
• intellimize_117854051 — experiment and session state
• intellimize_server_context_117854051 — request and server context
• intellimize_integrations_117854051 — integration data
• intellimize_data_tracking_type, intellimize_tracking_policy — tracking-mode flags

Embedded media

Set by YouTube (Google) when you play an embedded video, with your consent.

• YouTube cookies (for example VISITOR_INFO1_LIVE, YSC) — set by Google / YouTube to play the video, remember playback preferences, and measure views. Duration: up to about 6 months, or session.

These load only when you click to play a video, not when the page opens.

Managing cookies

• Consent banner: use the cookie settings on this site to review or change your choices.
• Browser controls: you can block or delete cookies in your browser settings. Blocking strictly necessary cookies may break parts of the Site.
• Opt-outs: browser help pages for Chrome, Firefox, Safari, and Edge explain how to manage cookies on each.

Changes

We may update this policy as the tools on the Site change. The "Last updated" date shows the current version.

Contact

Questions about cookies: mathias@mathiasholmgren.com.