Telemetry implications of per channel profiles

[Dave Townsend]

On Mon, Oct 16, 2017 at 9:31 AM Alessio Placitelli <aplacitelli at mozilla.com>
wrote:

>
> 2017-10-12 15:11 GMT+02:00 Romain Testard <romain at mozilla.com>:
>
>> Hi all,
>>
>> We're planning on implementing dedicated profiles per channel (bug
>> 1373244), hopefully in Firefox 59, to help address profile corruption
>> issues our users can encounter when using a profile previously used on a
>> later version.
>> Once it gets implemented we'll have more profiles on telemetry and it
>> probably impacts the interpretation we have of our telemetry data. A
>> solution may be to implement a correlation ID between different profiles
>> although current datasets and analysis would likely be impacted.
>>
>> If there are specific concerns about this please let me know since we’re
>> still at scoping stage.
>>
>
> Something came out in our team meeting today: we should make sure to
> retain the profile creation date when creating and populating a new clone
> profile  for Nightly/Beta [1], otherwise they will look like new users.
>
> [1] -
> http://searchfox.org/mozilla-central/source/toolkit/components/telemetry/TelemetryEnvironment.jsm#1411
>

This makes an assumption that we're cloning profiles for Beta/Nightly
users, something that hasn't really been figured out yet. How do we deal
with current users who have multiple profiles with different creation dates?
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