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Getting started
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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 <https://github.com/mozilla/gzipServer>`__ 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
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* `Telemetry Portal <https://telemetry.mozilla.org/>`_ - Discover all important resources for working with data
* `Telemetry Data Documentation <https://docs.telemetry.mozilla.org/>`_ - Find what data is available & how to use it