Cookie Lifetime Extender
Make your tracking resistant to the latest tracking preventions and extend your first-party cookie lifetime across all major browsers with the Cookie Lifetime Extender.
Overview
Modern browsers like Safari and Firefox are enforcing stricter privacy policies to curb long-term and cross-site tracking. While these changes aim to protect users, they also limit the lifespan of first-party cookies, even when server-side tracking is in use.
For example:
Safari (ITP 2.3+, especially version 16.4 and newer) limits first-party cookies to just 7 days if they’re set via a server that doesn't share the same subnet (first 2 octets of the IP address) as the website content.
Firefox (ETP) applies similar restrictions, especially to cookies related to known tracking behaviors or domains not closely associated with the website host.
These restrictions lead to:
Shortened cookie lifetimes (1–7 days);
Broken user journeys;
Missed conversions and attribution gaps;
Reduced campaign performance and reporting accuracy.
Solution: Cookie Lifetime Extender
With JENTIS’ Cookie Lifetime Extender, you can confidently preserve cookie lifetimes in the face of browsers' privacy restrictions. The feature ensures your tracking remains accurate, durable, and compliant, without compromising performance or setup complexity.
Maintain full cookie lifetime in Safari, Firefox, and other privacy-focused browsers;
Reduce data loss and conversion drop-offs;
Compatible with different infrastructures: Cloudflare, NGINX, Apache, IIS, Plesk, and more;
With built-in verification to ensure a reliable setup.
Activate the Cookie Lifetime Extender
To enable the Cookie Lifetime Extender in your JENTIS container:
Navigate to Settings > Containers;
Either create a new container or edit an existing one;
In the Basic Settings section, enable the Cookie Lifetime Extender.
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Configure Your Tracking
Once the Cookie Lifetime Extender is enabled:
Go to the Tracking Configuration tab;
Select your web server or CDN provider (e.g., NGINX, HAProxy, Apache, IIS, Cloudflare, Plesk);
Follow the step-by-step guided setup.
We currently offer tailored instructions for:
Coming soon:
Cloudflare
Azure
Google Cloud
Detailed configuration guides for each infrastructure are linked in the Tracking Configuration tab.
Why do I need to configure my web server/CDN?
To extend cookie lifetimes reliably, your web server/CDN must act as a proxy that meets the strict requirements enforced by modern browsers like Safari and Firefox.
Browsers such as Safari (with Intelligent Tracking Prevention) limit the lifespan of first-party cookies if they detect the cookie was set by a server not considered closely tied to your website, for example, servers with a different IP subnet or hostname.
By configuring your web server to proxy tracking requests via your main domain or infrastructure, you ensure:
Cookies appear to be set directly by your site, not a third-party tracker.
You comply with the latest browser rules.
You regain the ability to store cookies beyond 1–7 days.
This configuration allows JENTIS’ Cookie Lifetime Extender to do its job: protect your cookie durations and ensure accurate tracking across sessions and devices.
Verify Configuration
After completing your server setup:
Return to the Cookie Lifetime Extender section in your container;
Click on Verify Configuration;
JENTIS will check if the proxy is configured correctly and the cookie can persist beyond the browser-imposed limits.
Note: You must verify your DNS A Record before running the verification tool for this feature.
Final Steps
Make sure to publish the changes made in your container. Your tracking will now automatically route through the Cookie Lifetime Extender proxy. First-party cookies will retain their intended lifespan, even under the latest browser restrictions.
If you have any questions or suggestions, contact us through our Helpdesk.