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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 Mozilla. As you use Firefox, Telemetry measures and collects non-personal information, such as performance, hardware, usage and customizations. It then sends this information to Mozilla on a daily basis and we use it to improve Firefox.

Accessing Telemetry Data

Aggregate Telemetry data from all submissions can be viewed on the Telemetry dashboard at telemetry.mozilla.org.

Instance Telemetry data (collected in your browser) can be viewed by typing about:telemetry into the Firefox URL bar.


Firefox Users

Firefox Devs

Filing Bugs

Telemetry client (in product) bugs should be filed in Toolkit::Telemetry.

Telemetry dashboard bugs should be filed in Webtools::Telemetry Dashboard

Telemetry data related bugs should be filed in Webtools::Telemetry Server


Communication Type Mechanism Audience
Asking questions #telemetry on irc.mozilla.org devs
General discussion dev-platform and fhr-dev list devs
Announcements dev-platform, dev-planning lists all


Project Champion
Program Management
Product Benjamin Smedberg, Vladan Djeric
Client Engineering Vladan Djeric, Georg Fritzsche, Alessio Placitelli
Server Engineering Mark Reid
Data Analysis Roberto Vitillo
Privacy Sid Stamm
Legal Jishnu Menon


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