Firefox Health Report - understand your browser performance

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  • Revision id: 38493
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  • Creator: Verdi
  • Comment: Fixed {for} around ApplyToFx template
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  • Reviewed by: Verdi
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  • Readied for localization by: Verdi
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The Firefox Health Report provides you with information about your browser’s performance and stability over time. Mozilla uses this data to provide you with meaningful comparisons and tips. We also aggregate the data shared by everyone to make Firefox better for you.

Note: This applies to the latest Firefox beta version which can be downloaded from

How to view your Firefox Health Report

  • At the top of the Firefox window, click the Firefox button, go over to the Help sub-menu and select Firefox Health Report.At the top of the Firefox window, click the Help menu and select Firefox Health Report.On the menu bar, click the Help menu and select Firefox Health Report.
Note: If you have just installed Firefox, the information in the Health Report may not be accurate. It typically takes 14 days of browser use to see any trends.

How to turn data sharing on or off

Data sharing is on by default but you can always turn it on or off from the top of any Firefox Health Report page. Click on the Data Sharing button on the upper right corner of the page.

You can also turn sharing on or off with these steps:

  1. At the top of the Firefox window, click on the Firefox button and then select Options.At the top of the Firefox window, click on the Tools menu and then select Options.On 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 Options.Preferences.

  2. Select the Advanced panel.
  3. Select the Data Choices tab.
  4. Check or uncheck the box next to Enable Firefox Health Report.
  5. Click OK to close the Options window.Click Close to close the Preferences window.Close the Preferences window. Close the about:preferences page. Any changes you've made will automatically be saved.

When you turn sharing off, Mozilla will stop sending information about your browser to our servers. Any information that’s already on our servers will expire after 180 days.

Even if you choose not to share data with Mozilla, you will still see be able to see information about your browser when you go to the Firefox Health Report page. However, you won’t see comparison data from other browsers.

What is the Startup Time graph?

The Startup Time by Day graph shows how long it took your browser to start on any given day. The default view (Average), shows the median startup time for that day. Clicking on the “All” toggle shows all the startup times for the day. You can see up to 90 days of data on the graph.

How do I view the raw data collected?

You can view a text file of the data that Firefox Health Report collects by clicking on the Raw Data tab. This display shows the exact data that is being sent to Mozilla (if sharing is on).