What Is Cookie Tracking and How to Control It
What Are Cookies?
Cookies are small text files that websites store on your device. They allow websites to remember information about you between visits — keeping you logged in, remembering your preferences, and maintaining your shopping cart. Cookies serve genuinely useful functions, but they are also the foundation of much online tracking.
Understanding the difference between helpful cookies and tracking cookies helps you control your privacy without breaking the web functionality you rely on.
First-Party vs Third-Party Cookies
First-party cookies: Set by the website you are directly visiting. These typically serve useful functions — keeping you logged in, remembering your language preference, maintaining your cart. Generally beneficial.
Third-party cookies: Set by domains other than the one you are visiting — usually advertising and tracking companies. When you visit a news site, third-party cookies from ad networks track you. When you visit another site with the same ad network, it recognizes you. This cross-site tracking builds your behavioral profile.
Third-party cookies are the primary cookie privacy concern. They enable the tracking that follows you across the web.
How Cookie Tracking Works
1. You visit Site A, which includes a tracking script from an ad network 2. The ad network sets a third-party cookie identifying you 3. You visit Site B, which uses the same ad network 4. The ad network reads its cookie and recognizes you as the same person 5. Your behavior across both sites is linked 6. Repeated across thousands of sites, this builds a detailed behavioral profile
This profile powers targeted advertising and is often shared or sold among advertising and data broker networks.
The Decline of Third-Party Cookies
Major browsers have been phasing out third-party cookie support:
- Safari and Firefox block third-party cookies by default
- Chrome has been transitioning away from third-party cookies
However, the tracking industry has developed alternatives — browser fingerprinting, first-party data sharing, and server-side tracking — that continue tracking even without third-party cookies. Cookie control remains important but is not the complete privacy solution it once was.
How to Control Cookies
Block third-party cookies: In your browser settings, block third-party cookies while allowing first-party cookies. This preserves useful functionality while limiting cross-site tracking.
- Chrome: Settings > Privacy and security > Third-party cookies > Block
- Firefox: Blocks by default with Enhanced Tracking Protection
- Safari: Blocks by default
Clear cookies regularly: Periodically clearing cookies removes accumulated tracking. Note this also logs you out of sites.
Use cookie-blocking extensions: uBlock Origin and Privacy Badger block tracking cookies and scripts.
Manage cookie consent: Cookie consent banners (required by GDPR) let you reject non-essential cookies. Take the time to reject rather than accept all.
Use private browsing for sensitive activity: Private/incognito mode does not persist cookies after the session ends.
Cookie Consent Banners
Since GDPR, websites must obtain consent for non-essential cookies. When you see a cookie banner:
- "Reject All" or "Necessary Only" limits tracking
- "Accept All" enables full tracking
- "Manage Preferences" lets you choose specific categories
Many banners use dark patterns to make "Accept All" easier than rejecting. Taking the extra moment to reject non-essential cookies is a small but meaningful privacy action.
Cookies and Email Privacy
Cookie tracking and email tracking are related but distinct. Cookies track your browsing behavior; your email address links that behavior to your identity across devices and platforms. Using Temp90 for registrations prevents your email from being the identity anchor that ties your cookie-tracked behavior to your real identity across services.
Frequently Asked Questions
Will blocking cookies break websites?
Blocking third-party cookies rarely breaks functionality, since these are mostly for tracking. Blocking first-party cookies can break logins and preferences. The recommended approach is blocking third-party while allowing first-party cookies.
Do cookies track me across different devices?
Cookies are device and browser specific. However, when you log into accounts (especially with the same email) across devices, companies link your activity across devices through your account — which is why email identity matters alongside cookie control.
Is clearing cookies enough for privacy?
Clearing cookies helps but is not complete. Browser fingerprinting and other tracking methods work without cookies. Combine cookie control with anti-fingerprinting measures, tracker blocking, and email privacy for comprehensive protection.
Conclusion
Cookies range from genuinely useful (first-party login and preference cookies) to privacy-invasive (third-party tracking cookies). Controlling cookies — blocking third-party cookies, rejecting non-essential consent, and using tracker-blocking extensions — meaningfully reduces cross-site tracking. As the tracking industry develops cookie alternatives, combining cookie control with broader privacy measures including Temp90 for email identity protection provides the most durable privacy.