Firefox Focus and Firefox Klar Privacy Notice by Mozilla
Updated 9 December 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.
To understand usage of Firefox Focus
We collect a minimal amount of technical and interaction data in order to understand how many daily active users Focus has. For a technical overview of the data collected in this daily usage ping, see more detail for Focus on Android and Focus on iOS. This data is retained for no more than 25 months, and you can opt out of sending the Daily Usage Ping in your data collection settings at any time. Klar does not collect data on daily active users by default, but Klar users can opt in to sending it in their data collection settings.
You can see more detail about the information we collect for Focus on Android, Focus on iOS, Klar on Android or Klar on iOS.
How we share your personal data
To provide our services as described above, we may disclose personal data to:
Search Engine Providers | To offer you a variety of search engine providers, we have contractual agreements in place with various search providers. |
Mozilla controlled entities and successors | As a global company, we share data across Mozilla-controlled affiliates and subsidiaries. We may also need to disclose personal data as part of a corporate transaction, such as a merger, acquisition, sale of assets or similar transaction. |
International transfers of data
Mozilla Corporation (and our servers) are based in the United States. Because we are a global company, in order to provide the services outlined in this Privacy Notice, the information we collect may be accessed from locations where our people are located and data may also be transferred to other jurisdictions as a result of sharing data with our partners. Whenever data is transferred across international borders, we ensure we have appropriate mechanisms in place (such as standard contractual clauses approved by the European Commission and other relevant authorities) to protect your personal data. You can contact [email protected] for information on the safeguards implemented for international transfers, or for copies of the relevant standard contractual clauses.
Your rights and choices
Your rights
You have the right to:
Be informed about what data we process about you, why and who it’s shared with (that’s this Notice!)
Request a copy of the data we have about you
Request portability of your data
Request correction of any data we hold about you that is inaccurate or incomplete
Have personal data we hold about you deleted (in certain circumstances)
In some cases, restrict or object to how we use your personal data
Complain to your relevant data protection authority if you have concerns about how we’re handling your personal data. We’d prefer it if you contact us first (via [email protected]), but you can also reach out to your relevant EU data protection authority, or search for (and contact) your local data protection authority
To make any of the above requests regarding your personal data, please contact us (Mozilla Corporation) through our Data Subject Access Request Portal; we will never discriminate against anyone for exercising their privacy rights. If you have any other questions regarding personal data or our privacy practices, please contact us at [email protected].
If you’re in the UK or EEA, you can also contact our Data Protection Officer at [email protected], or by mail at:
Bird & Bird DPO Services SRL
Avenue Louise 235 b 1
1050 Brussels
Belgium
We respond to all requests we receive from individuals wishing to exercise their data protection rights in accordance with applicable data protection laws, and we may need to ask you for additional information to confirm your identity before we can proceed with your request.
Your choices
You can update your data collection settings at any time.
Applicability (Focus / Klar version)
This privacy notice is for the most recent general release version of Focus or Klar distributed by Mozilla. If you obtain Focus or Klar elsewhere, or are running an older version, your copy may contain different privacy characteristics.
Changes
We may need to change this policy and our notices, in which case the updates will be posted online and we will update the effective date of this notice. If the changes are substantive, we will also announce the update more prominently through Mozilla's usual channels for such announcements, such as blog posts and forums.
Types of data defined
Data Type | Description | Examples for Focus / Klar users |
Technical data | This is information about the hardware you are accessing our services from (such as your desktop computer, smartphone or tablet), its configurations and its connection to Focus / Klar. | Device type, operating system, IP address, ISP (Internet Service Provider). |
Settings | These are your preferences or settings as to how the services are provided, such as your privacy preferences or toolbar settings. If you have not made any specific choices, these will be the default settings. | Enhanced Tracking Protection settings, cookie settings, permissions (location, camera, microphone), toolbar customization. |
System performance data | This is data about how the services are operating on your device. | Memory usage, page rendering speed. |
Location | We infer your location from your IP address at the level of your country, city, or region. | Country code, city. |
Precise Location | Your precise location (within a few feet or meters). | Precise location. |
Language preference | Your inferred or preferred language (if you provide it in settings) for interacting with our services. | Language. |
Unique identifiers | These are unique identifiers, which may be created at various times to manage your interactions with the service. | Client_id, session_id. |
Interaction data | This is data about how you engage with our services, such as how many searches you’ve performed. | Click counts, number of searches performed, time on page. |
Search data | This is data about the search query searched for. | Search term (“current weather in Boston”). |
Browsing data | This is information about websites and URLs you’ve visited. | Specific URLs. |
Lawful basis
What we use your data for | What data we process | Our lawful basis |
To provide you with the Firefox Focus and Klar browser | Any data type may be processed locally on your device. | Contract to provide you with the necessary functionality for Focus and Klar to operate.Legitimate interest in making the data on your device work for you. |
To provide and improve search functionality | * Location |
Language preference
Search data | Legitimate interest in providing search functionality. | | To maintain and improve features, performance and stability | - Technical data
Unique identifiers
System performance
Browsing data | Consent when you choose to send us crash reports. | | To improve security | * Technical data
Location
Unique identifiers
Browsing data (for DNS over HTTPs only) | Legitimate interest in providing additional security measures. | | To understand usage of Firefox | - Technical data
Interaction data | Legitimate interest in understanding how much Focus is used, enabling business functions such as usage reporting and forecasting.Consent when Klar users opt in to sending this data for usage reporting. |
Privacy notices for search providers
DuckDuckGo
Amazon.com
eBay.com
Wikipedia
About this template
What is this template?
Firefox Focus and Firefox Klar Privacy Notice by Mozilla is a free, ready-to-use Data Protection & Privacy template you can open, customize, and download on GitLaw. It gives you a professionally structured starting point, so you never have to draft from a blank page. The wording is plain and modern, organized into clear sections that are easy to read, edit, and adapt to your own situation before you share or sign it.
When should you use it?
Reach for this Data Protection & Privacy template whenever you need a reliable agreement quickly and want to be sure the essentials are covered. It suits individuals, freelancers, startups, and established businesses alike. Instead of paying for a document drafted from scratch, you can start here, tailor the details to your arrangement, and have a polished draft ready in minutes. This version is drafted with England & Wales, European Union, and Belgium in mind, though you should always review the final wording against the laws that apply to you.
What's typically included?
A well-drafted Data Protection & Privacy usually sets out the parties involved, the scope of the agreement, and each side's rights and responsibilities. Expect sections covering key terms and definitions, how long the agreement lasts, how it can be ended, and what happens if something goes wrong. This template brings those building blocks together in a sensible order, so you can focus on the specifics rather than worrying about what to include. Open it to read the full document, then sign up to edit, negotiate, and e-sign it directly in GitLaw.