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This article describes which data is collected by Firefox for Android, Firefox for iOS, Firefox Focus, and Firefox Klar.

<!--German-speaking L10N, please reword all of "Firefox Focus" to "Firefox Klar. Do NOT mention Firefox Focus."--> The ''Send usage data'' control appears in the settings menu for many of Mozilla’s mobile products. This controls your sharing of crash, technical, testing, notifications and campaign measurement data. __TOC__ Below is a summary of what the “Send usage data” control covers. Each product privacy notice describes the actual data collection, and for full transparency, you can view Firefox's [https://dictionary.telemetry.mozilla.org/ Glean data dictionary]. =Technical and interaction data= *Mozilla receives this to improve performance and stability. *This data is sent by default to Mozilla from Firefox and Focus for iOS and Firefox and Focus for Android. =Crash and error data= *Some of our mobile products use developer tools to evaluate the reason for crashes and improve performance and stability. *This data is sent to Mozilla by default from Firefox and Focus for iOS. =Feature testing and notification data= *Some of our mobile products use developer tools to track and test different features and experiences or provide customized notifications. *This data is sent by default to Mozilla from Firefox for iOS, Firefox for Android. =Campaign measurement and data= *Some of our mobile products use tracking tools to measure and support our marketing. *This data is sent by default to Mozilla and Adjust GmbH from Firefox for Android. =Frequently Asked Questions= ==Why do you enable data collection by default?== This helps us gain valuable insight into how our mobile products are performing so that we can improve those products. Data collection is turned off by default in Firefox Klar. If you enable it, we will only receive the technical and interaction data described above. ==Why do you use third-party platforms?== We use third-party platforms for functionality and services that we can’t build internally or when it is more efficient to use another service. Learn more about our use of [[How do you use Google Firebase in Firefox? | Firebase]] and [[How do you use Adjust in Firefox? | Adjust GmbH]]. ==How do I turn off data collection and reporting?== You can turn off this collection and reporting in the Settings menu: ===Firefox for iOS=== #[[Template:iosmenu]] #[[Template:settingsios]] #Scroll down to the '''Support''' section and turn off {menu Send Usage Data} by sliding the toggle to the left (it will change from blue to white when it is disabled). ===Firefox for Android=== #[[Template:menupreview]] #Select {menu Settings}. #Select {menu Data collection} under the '''Privacy and Security''' section. #You will see different types of data collection: '''Usage and technical data''': When enabled this allows Mozilla to share performance, usage, hardware and customization data about your browser to help improve Firefox. '''Experiments''': When enabled this allows Mozilla to install and collect data for experimental features. You can turn off any of these collection types at any time by tapping the toggle to the left (it will change from purple to white when it is disabled). ''Older Versions of Firefox for Android:'' #Tap the menu button [[Template:AndroidMenuLocation]] followed by {menu Settings} [[Template:AndroidMore]]. #Tap on the ''Privacy'' section, scroll down and remove the check mark next to ''Firefox Health Report''. ===Firefox Focus and Firefox Klar=== #Tap the menu icon (the three dots) and then tap {menu Settings}. If you are in the browser, you may have to hit the ''trash'' icon first. #{for android}Tap '''Privacy & Security''', scroll down to the '''Data Choices''' section, and then turn the switch off next to ''Send usage data''.{/for}{for not android}Turn the switch off next to ''Send usage data''.{/for}