LocalStorage Isolation means keeping the localStorage data of each browser profile or session completely separate, so that information saved in one environment cannot be read or reused in another.

What is localStorage?

• localStorage is a built-in browser feature that lets websites store small pieces of data directly on your device.
• Unlike cookies, localStorage does not get sent with every HTTP request - it stays in the browser, available to scripts on that site.
• It is persistent: data remains even after closing and reopening the browser, unless it is cleared.
• Websites often use it to remember settings, login states, or tracking identifiers.

Why LocalStorage Isolation Matters

Without isolation, localStorage values from one profile or session could “leak” into another. This can create several problems:

• Tracking across profiles: A site could recognize you by a unique ID stored in localStorage, even if you switch profiles.
• Fingerprinting signal: The presence of certain localStorage values can act as a stable identifier across visits.
• Security concerns: Sensitive data cached in localStorage might become accessible in a context where it doesn’t belong.

How LocalStorage Isolation works

• Each profile (e.g., work vs. personal browser profile) and each session (e.g., normal vs. incognito window) gets its own separate localStorage container.
• Data saved in one container is invisible to another.
• Some privacy tools and virtual browsing solutions enforce strict isolation so no cross-pollination of localStorage data is possible.

In short: LocalStorage Isolation ensures that data websites store in localStorage is sandboxed per profile or session. This prevents tracking, improves privacy, and keeps different browsing contexts cleanly separated.

How can Kameleo Help

Kameleo creates separate browser profiles that don’t share data with each other. This means anything a website saves in localStorage (like login info or settings) stays locked inside that one profile. As a result, sites can’t track you across profiles, and each profile looks like a completely independent browser.