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Firefox handles data with transparency—learn more about what that means for you. Read the Firefox Privacy Notice.
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.
Table of Contents
What is technical and interaction data?
Technical and interaction data, also called telemetry 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.
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:
On desktop
- Open Firefox, and click the menu button ≡ in the top-right corner.
- Select .
- Go to the 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.
If you opt out of sending telemetry data, we will also treat this as a request to delete any data we previously collected. Data will be deleted within 30 days after you opt out.
On Android
- Open Firefox, and tap the menu button in the top-right corner.
- Select .
- Tap Privacy and Security, then tap Data collection.
- Toggle off Send technical and interaction data.
On iOS
- Open Firefox, and tap the menu button ≡ at the bottom of the screen.
- Select .
- Scroll down to the Support section.
- Toggle off Send Technical and Interaction Data.
Related content
If you’d like to dive deeper into how Firefox handles your data, check out these resources:
