What is LCP with cookies on/off
LCP with cookies on/off shows the Largest Contentful Paint (LCP) grouped by whether the user's browser had cookies enabled or disabled at the time of their visit.
This lens helps you understand whether your site’s performance is dependent on cookie access - which is increasingly important as more users browse in privacy-focused modes, such as incognito or with tracking disabled.
🔍 Browsers with cookies disabled often block other features too, like localStorage or certain scripts. This can cause meaningful layout and performance differences.
Healthy LCP with cookies on/off sample
Should you worry
If both cookies enabled and cookies disabled show green bars, that means your site handles privacy-conscious visitors as gracefully as it does standard ones.
Unhealthy LCP with cookies on/off sample
When cookies disabled has slower LCP, it’s often tied to fallback behavior or layout regressions. Examples include:
Personalization scripts or A/B tools failing to execute, causing layout flashes or reflows.
Critical content delays due to cookie checks or conditional rendering.
Blocking consent banners or cookie notices affecting visual stability.
Third-party dependencies (like fonts or analytics) failing and cascading delays.
Conversely, if cookies enabled has slower LCP, it may point to heavy personalization logic or early script execution that slows the initial paint.
Either way, inconsistent performance across cookie states is worth addressing — especially with privacy features growing more common across devices.
Resolving unhealthy LCP with cookies on/off
Go-to action plan to resolve an unhealthy LCP with cookies on/off:
Ask Uxi to analyze your LCP with cookies on/off values and suggest improvements.
Use Filters to isolate the impacted state and identify which pages or components show the biggest difference.
Simulate LCP of the suspected lens to see if fixing it will resolve the slow LCP with cookies on/off. If yes, this is where the resolution focus should be.
Use an automated LCP optimization tool like Navigation AI to improve your LCP with cookies on/off values.
Once you’ve improved LCP, set an alert to be the first to know if it starts worsening again.
Try it yourself
Discover how your website performs with real user data.