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===============
Data collection
===============
There are different APIs and formats to collect data in Firefox, all suiting different use cases.
In general, we aim to submit data in a common format where possible. This has several advantages; from common code and tooling to sharing analysis know-how.
In cases where this isn't possible and more flexibility is needed, we can submit custom pings or consider adding different data formats to existing pings.
*Note:* Every new data collection must go through a `data collection review <https://wiki.mozilla.org/Firefox/Data_Collection>`_.
The current data collection possibilities include:
* :doc:`scalars` allow recording of a single value (string, boolean, a number)
* :doc:`histograms` can efficiently record multiple data points
* ``environment`` data records information about the system and settings a session occurs in
* :doc:`events` can record richer data on individual occurrences of specific actions
* :doc:`Measuring elapsed time <measuring-time>`
* :doc:`Custom pings <custom-pings>`
* :doc:`Experiment annotations <experiments>`
* :doc:`Remote content uptake <uptake>`
* :doc:`WebExtension API <webextension-api>` can be used in privileged webextensions
* :doc:`User Interactions <user-interactions>` allow annotating hang report pings with information on what the user was interacting with at the time
.. toctree::
:maxdepth: 2
:titlesonly:
:hidden:
:glob:
scalars
histograms
events
measuring-time
custom-pings
experiments
uptake
*
Browser Usage Telemetry
~~~~~~~~~~~~~~~~~~~~~~~
For more information, see :ref:`browserusagetelemetry`.
Version History
~~~~~~~~~~~~~~~
- Firefox 61: Stopped reporting Telemetry Log items (`bug 1443614 <https://bugzilla.mozilla.org/show_bug.cgi?id=1443614>`_).
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