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Firefox handles data with transparency—learn more about what that means for you. Read the Firefox Privacy Notice.

Firefox collects technical and interaction data to understand how you use the browser and to make it better for everyone. This data helps Mozilla fix bugs, improve performance, and add features that people love.

This article explains what data is collected, how Mozilla uses it, and how you can turn off technical and interaction data collection on your device.

What is technical and interaction data?

Technical and interaction data is information about how Firefox functions on your device and how you use its features. This includes performance details like page load times, and memory usage, as well as insights into which Firefox features you interact with, such as bookmarks, tabs, or settings. Additionally, it collects general device information, including your operating system, browser version, and hardware specifications. Mozilla gathers this data to enhance Firefox while respecting your privacy.

This data doesn’t include information like your browsing history, search queries, or saved passwords.

Where can I learn more about what specific data is collected?

For a more detailed view of the technical and interaction data collected by Firefox, see the definitions in the Glean Dictionary.

How does Mozilla use this data?

Mozilla uses technical and interaction data for many things, including to:

Fix problems: Identify bugs and improve Firefox’s performance.
Build better features: See which features are popular and how we can improve them.
Understand trends: Learn how people use Firefox without compromising their privacy.

You can learn about all the ways we use technical and interaction data in our Privacy Notice.

How to turn off technical and interaction data collection

If you’d prefer to opt out of this data collection, you can easily turn it off in Firefox. Here’s how to do it on your device:

Note: Turning off technical and interaction data does not disable or prevent the DAU ping. To opt out, follow the steps in Manage daily usage ping data collection settings in Firefox.

On desktop

Open Firefox and click the menu button ≡ in the top-right corner.
Select Settings.
Go to the Privacy & Security panel.
Scroll down to Firefox Data Collection and Use.
Uncheck the box next to Allow Firefox to send technical and interaction data to MozillaSend technical and interaction data to Mozilla.