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Preferences and Defines
=======================
Telemetry behaviour is controlled through the mozconfig defines and preferences listed here.
mozconfig Defines
-----------------
``MOZ_TELEMETRY_REPORTING``
When Defined (which it is for official builds):
* If ``RELEASE_OR_BETA`` is not defined, defines ``MOZ_TELEMETRY_ON_BY_DEFAULT``
When Not Defined:
* If ``datareporting.healthreport.uploadEnabled`` is locked, we print a message in the Privacy settings that you cannot turn on data submission and disabled the checkbox so you don't try.
* Android: hides the data submission UI to prevent users from thinking they can turn it on
* Disables Telemetry from being sent (due to ``Telemetry::IsOfficialTelemetry``)
``MOZ_TELEMETRY_ON_BY_DEFAULT``
When Defined:
* Android: enables ``toolkit.telemetry.enabled``
``MOZ_SERVICES_HEALTHREPORT``
When Defined (which it is on most platforms):
* Sets ``datareporting.healthreport.{infoURL|uploadEnabled}`` in ``modules/libpref/init/all.js``.
``MOZ_DATA_REPORTING``
When Defined (which it is when ``MOZ_TELEMETRY_REPORTING``, ``MOZ_SERVICES_HEALTHREPORT``, or ``MOZ_CRASHREPORTER`` is defined (so, on most platforms, but not typically on developer builds)):
* Enables ``app.shield.optoutstudies.enabled``
When Not Defined:
* Disables ``app.shield.optoutstudies.enabled``
* Removes parts of the Data Collection Preferences UI in ``privacy.xhtml``
``MOZILLA_OFFICIAL``
When Not Defined (defined on our own external builds and builds from several Linux distros, but not typically on defeloper builds):
* Disables Telemetry from being sent (due to ``Telemetry::IsOfficialTelemetry``)
``MOZ_UPDATE_CHANNEL``
When not ``release`` or ``beta``:
* If ``MOZ_TELEMETRY_REPORTING`` is also defined, defines ``MOZ_TELEMETRY_ON_BY_DEFAULT``
When ``beta``:
* If ``toolkit.telemetry.enabled`` is otherwise unset at startup, ``toolkit.telemetry.enabled`` is defaulted to ``true`` (this is irrespective of ``MOZ_TELEMETRY_REPORTING``)
When ``nightly`` or ``aurora`` or ``beta`` or ``default``:
* Desktop: Locks ``toolkit.telemetry.enabled`` to ``true``. All other values for ``MOZ_UPDATE_CHANNEL`` on Desktop locks ``toolkit.telemetry.enabled`` to ``false``.
* Desktop: Defaults ``Telemetry::CanRecordExtended`` (and, thus ``Telemetry::CanRecordReleaseData``) to ``true``. All other values of ``MOZ_UPDATE_CHANNEL`` on Desktop defaults these to ``false``.
``DEBUG``
When Defined:
* Disables Telemetry from being sent (due to ``Telemetry::IsOfficialTelemetry``)
**In Short:**
For builds downloaded from mozilla.com ``MOZ_TELEMETRY_REPORTING`` is defined, ``MOZ_TELEMETRY_ON_BY_DEFAULT`` is on if you downloaded Nightly or Developer Edition, ``MOZ_SERVICES_HEALTHREPORT`` is defined, ``MOZ_DATA_REPORTING`` is defined, ``MOZILLA_OFFICIAL`` is defined, ``MOZ_UPDATE_CHANNEL`` is set to the channel you downloaded, and ``DEBUG`` is false. This means Telemetry is, by default, collecting some amount of information and is sending it to Mozilla.
For builds you make yourself with a blank mozconfig, ``MOZ_UPDATE_CHANNEL`` is set to ``default`` and everything else is undefined. This means Telemetry is, by default, collecting an extended amount of information but isn't sending it anywhere.
Preferences
-----------
``toolkit.telemetry.unified``
This controls whether unified behavior is enabled. If true:
* Telemetry is always enabled and recording *base* data.
* Telemetry will send additional ``main`` pings.
It defaults to ``true``, but is ``false`` on Android (Fennec) builds.
``toolkit.telemetry.enabled``
If ``unified`` is off, this controls whether the Telemetry module is enabled. It can be set or unset via the `Preferences` dialog in Firefox for Android (Fennec).
If ``unified`` is on, this is locked to ``true`` if ``MOZ_UPDATE_CHANNEL`` is ``nightly`` or ``aurora`` or ``beta`` or ``default`` (which is the default value of ``MOZ_UPDATE_CHANNEL`` for developer builds). Otherwise it is locked to ``false``. This controls a diminishing number of things and is intended to be deprecated, and then removed.
``datareporting.healthreport.uploadEnabled``
If ``unified`` is true, this controls whether we send Telemetry data.
If ``unified`` is false, we don't use this value.
``toolkit.telemetry.archive.enabled``
Allow pings to be archived locally. This can only be enabled if ``unified`` is on.
``toolkit.telemetry.server``
The server Telemetry pings are sent to. Change requires restart.
``toolkit.telemetry.log.level``
This sets the Telemetry logging verbosity per ``Log.sys.mjs``. The available levels, in descending order of verbosity, are ``Trace``, ``Debug``, ``Config``, ``Info``, ``Warn``, ``Error`` and ``Fatal`` with the default being ``Warn``.
By default logging goes only the console service.
``toolkit.telemetry.log.dump``
Sets whether to dump Telemetry log messages to ``stdout`` too.
``toolkit.telemetry.shutdownPingSender.enabled``
Allow the ``shutdown`` ping to be sent when the browser shuts down, from the second browsing session on, instead of the next restart, using the :doc:`ping sender <pingsender>`.
``toolkit.telemetry.shutdownPingSender.enabledFirstSession``
Allow the ``shutdown`` ping to be sent using the :doc:`ping sender <pingsender>` from the first browsing session.
``toolkit.telemetry.firstShutdownPing.enabled``
Allow a duplicate of the ``main`` shutdown ping from the first browsing session to be sent as a separate ``first-shutdown`` ping.
``toolkit.telemetry.newProfilePing.enabled``
Enable the :doc:`../data/new-profile-ping` on new profiles.
``toolkit.telemetry.newProfilePing.delay``
Controls the delay after which the :doc:`../data/new-profile-ping` is sent on new profiles.
``toolkit.telemetry.updatePing.enabled``
Enable the :doc:`../data/update-ping` on browser updates.
``toolkit.telemetry.eventping.minimumFrequency``
The minimum frequency at which an :doc:`../data/event-ping` will be sent.
Default is 60 (minutes).
``toolkit.telemetry.eventping.maximumFrequency``
The maximum frequency at which an :doc:`../data/event-ping` will be sent.
Default is 10 (minutes).
``toolkit.telemetry.overrideUpdateChannel``
Override the ``channel`` value that is reported via Telemetry.
This is useful for distinguishing different types of builds that otherwise still report as the same update channel.
``toolkit.telemetry.ipcBatchTimeout``
How long, in milliseconds, we batch accumulations from child processes before
sending them to the parent process.
Default is 2000 (milliseconds).
``toolkit.telemetry.pioneerId``
If a user has opted into the Pioneer program, this will contain their Pioneer ID.
Data-choices notification
-------------------------
``toolkit.telemetry.reportingpolicy.firstRun``
This preference is not present until the first run. After, its value is set to false. This is used to show the infobar with a more aggressive timeout if it wasn't shown yet.
``datareporting.policy.firstRunURL``
If set, a browser tab will be opened on first run instead of the infobar.
``datareporting.policy.dataSubmissionEnabled``
This is the data submission master kill switch. If disabled, no policy is shown or upload takes place, ever.
``datareporting.policy.dataSubmissionPolicyNotifiedTime``
Records the date user was shown the policy. This preference is also used on Android.
``datareporting.policy.dataSubmissionPolicyAcceptedVersion``
Records the version of the policy notified to the user. This preference is also used on Android.
``datareporting.policy.dataSubmissionPolicyBypassNotification``
Used in tests, it allows to skip the notification check.
``datareporting.policy.currentPolicyVersion``
Stores the current policy version, overrides the default value defined in TelemetryReportingPolicy.sys.mjs.
``datareporting.policy.minimumPolicyVersion``
The minimum policy version that is accepted for the current policy. This can be set per channel.
``datareporting.policy.minimumPolicyVersion.channel-NAME``
This is the only channel-specific version that we currently use for the minimum policy version.
Testing
-------
The following prefs are for testing purpose only.
``toolkit.telemetry.initDelay``
Delay before initializing telemetry (seconds).
``toolkit.telemetry.minSubsessionLength``
Minimum length of a telemetry subsession and throttling time for common environment changes (seconds).
``toolkit.telemetry.collectInterval``
Minimum interval between data collection (seconds).
``toolkit.telemetry.scheduler.tickInterval``
Interval between scheduler ticks (seconds).
``toolkit.telemetry.scheduler.idleTickInterval``
Interval between scheduler ticks when the user is idle (seconds).
``toolkit.telemetry.idleTimeout``
Timeout until we decide whether a user is idle or not (seconds).
``toolkit.telemetry.modulesPing.interval``
Interval between "modules" ping transmissions.
``toolkit.telemetry.send.overrideOfficialCheck``
If true, allows sending pings on unofficial builds. Requires a restart.
``toolkit.telemetry.testing.overridePreRelease``
If true, allows recording opt-in Telemetry on the Release channel. Requires a restart.
``toolkit.telemetry.untrustedModulesPing.frequency``
Interval, in seconds, between "untrustedModules" ping transmissions.
``toolkit.telemetry.healthping.enabled``
If false, sending health pings is disabled. Defaults to true.
``toolkit.telemetry.testing.disableFuzzingDelay``
If true, ping sending is not delayed when sending between 0am and 1am local time.
``toolkit.telemetry.testing.overrideProductsCheck``
If true, allow all probes to be recorded no matter what the current product is.