Firefox Focus and Firefox Klar Privacy Notice by Mozilla

MozillaUpdated 9 Dec 2025

Firefox Focus and Firefox Klar Privacy Notice

Effective April 22, 2025

At Mozilla, we believe that privacy is fundamental to a healthy internet

That’s why we build Firefox Focus and Klar, and all our products, to give you greater control over the information you share online and the information you share with us. In this Privacy Notice, we explain what data we process, how we process it, and for what purposes. Then, we explain how you can exercise choices about how we process your information.

How Mozilla processes your data

To provide you with the Firefox Focus and Klar browser

Focus and Klar process technical and settings data, as well as browsing history, web form data, temporary internet files, and cookies on your device to provide the core functionality of the browser, distinguish your device from others, remember and respect your settings. This means the data stays on your device unless it says otherwise in this Notice. Your browsing data is cleared from your device whenever you close your browser.

Additionally, if you choose to allow it, your precise location may be processed for location-related functionality for websites like Google Maps; this data is only accessed from your device by the website(s) you choose to enable it for — it is not sent to Mozilla's servers. You can tap the trash can icon in the toolbar at any time to delete your browsing data or update your location permissions at any time.

To provide and improve search functionality

When you perform a search, your search query, device information and location data will be processed by your default search engine (according to their applicable Privacy Notice) to provide your search results. You can also choose to enable your default search engine to provide search suggestions.

To maintain and improve performance and stability

If Focus or Klar (on Android) encounters an unexpected issue, the Mozilla Crash Reporter will ask if you wish to send us information, which may include sites that were open at the time of the crash and other browsing data. On iOS, crash reports contain less information and are sent automatically by default; you can change your iOS settings at any time.

To improve security

We use Google’s Safe Browsing Service to protect you from malicious downloads and phishing attacks, and validate webpage and technical data with Certificate Authorities.

For some users, Focus and Klar route DNS requests to a resolver service that has agreed to Mozilla’s strict privacy standards for resolvers. This provides added protection from privacy leaks to local networks and also from certain DNS security attacks. System logs of your DNS requests are deleted from the service within 24 hours and are only used for the purpose of DNS resolution. Learn more about DNS over HTTPS.

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England & Wales note

This version is drafted for England & Wales. Scotland and Northern Ireland differ on some points — for example notice periods and tribunal procedure. Tell GitLaw where you hire and it adjusts the draft.

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Document info
HTML document. Document created on Tue Nov 4th, 2025. Last updated on Tue Dec 9th, 2025.
This document is public
Licensed under CC BY 4.0 (Attribution).
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