=============== Getting started =============== If you are interested in extending data collection by adding new probes have a look at .. toctree:: :maxdepth: 2 :titlesonly: :glob: adding-a-new-probe report-gecko-telemetry-in-glean If you want to work with the telemetry code itself, for example to fix a bug, it is often helpful to start with these steps: 1. Have a look at about:telemetry to see which data is being collected and sent. 2. Increase the log level in about:config by setting toolkit.telemetry.log.level to Debug or Trace. This will show telemetry information in the browser console. To enable the browser console follow `these instructions <../../../../devtools-user/browser_console/index.html>`__. 3. Run a local telemetry receiver, e.g. `this one `__ and set ``toolkit.telemetry.server`` to “localhost” (Like the next preference this needs a restart.) 4. Set ``toolkit.telemetry.send.overrideOfficialCheck = true``, otherwise local debug builds will not send telemetry data. (Requires restart.) More information about the internals can be found `here <../internals/index.html>`__. Further Reading ############### * `Telemetry Portal `_ - Discover all important resources for working with data * `Telemetry Data Documentation `_ - Find what data is available & how to use it