Send performance data to Mozilla to help improve Firefox

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It's helpful for Mozilla's engineers to be able to measure how Firefox behaves in the real world. The Telemetry feature provides this capability by sending performance and usage info to us. As you use Firefox, Telemetry measures and collects non-personal information, such as memory consumption, responsiveness timing and feature usage. It then sends this information to Mozilla on a daily basis and we use it to make Firefox better for you.

Telemetry is an opt-in feature. This means that you specifically need to tell Firefox to collect and send this information to us. For more about what kind of information is collected and how it's used, see our privacy policy.

How do I opt-in or opt-out of sending performance data?

When you install or update Firefox you may be presented with the following message that lets you turn the Telemetry feature on: "Will you help improve Mozilla Firefox by sending information about performance, hardware, usage, and customizations to Mozilla?"

Telemetry prompt - win
Telemetry prompt - lin

You can also turn this on and off at any time with these steps:

  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

  2. Select the Advanced panel.
  3. Select the General tab.
  4. Check or uncheck the box next to Submit performance data.
    Telemetry - win
    Telemetry - lin
  5. Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window

You can turn this on and off at any time with these steps:

  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

  2. Select the Advanced panel.
  3. Select the Data Choices tab.
  4. Check or uncheck the box next to Enable Telemetry.

    fx20 options - advanced - data choices


    Enable Telemetry - Win7
  5. Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window



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