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.
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.
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.
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:
https://docs.google.com/document/d/1JKnqejahVWMev4xUYGbRiICw0HpwopcXBqPYxco0YzU/edit?usp=sharing
Please direct any questions or concerns to the mozilla.dev.privacy list.
--BDS
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