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id="docs-internal-guid-fb5b1b9d-ac3b-ae2d-cd78-5c9e13f3699d"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">In
order to implement A/B and other experimental testing of Firefox
features, we intend to begin incremental changes to combine the
Telemetry and FHR data collection systems.</span></p>
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style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">As
a first step, we are looking to add certain specific data items
related to planned A/B tests and experiments to be recorded in
the FHR data collection system. These items, such as translation
rates for the planned in-browser translation project, will still
fall under the “Usage Statistics” section of the Firefox privacy
policy and will only be collected from users who have telemetry
enabled. The primary purpose of this change is to allow us to
answer questions about how users behave across multiple
sessions, which is currently not possible with Telemetry. As in
the past, none of the data collected will be personal or
identify particular users.</span></p>
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style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">We
plan to make any necessary changes to the Firefox in-product
notices, privacy policy and supporting wiki pages to allow this
kind of mixed data collection. Because this is new, we will be
carefully reviewing the measurements for privacy concerns around
fingerprinting or private data.</span></p>
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style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">In
the future, we hope to more fully integrate the data collection
systems so that telemetry and FHR use the same server backend
and reporting systems. On the client, my goal is to separate the
policy decisions about whether a measurement is enabled or
disabled by default from the implementation details of whether
it is declared as a telemetry histogram or healthreport
reporter. On the server, I want to share dashboards, query
systems, and and techniques, no matter whether the measurement
is an opt-out FHR probe or an opt-in telemetry probe. I have
written up some details about this long-term goal here, for
those who are interested, but this plan isn’t complete yet:
<a class="moz-txt-link-freetext" href="https://docs.google.com/document/d/1JKnqejahVWMev4xUYGbRiICw0HpwopcXBqPYxco0YzU/edit?usp=sharing">https://docs.google.com/document/d/1JKnqejahVWMev4xUYGbRiICw0HpwopcXBqPYxco0YzU/edit?usp=sharing</a></span></p>
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style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">Please
direct any questions or concerns to the mozilla.dev.privacy
list.</span></p>
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style="line-height:1.15;margin-top:0pt;margin-bottom:0pt;"><span
style="font-size:15px;font-family:Arial;color:#000000;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;">--BDS<br>
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