Below is an attempt to write comments on the charter to consider the
feedback so far in this thread.  It's not clear to me what the right
charter changes to suggest for the privacy and fingerprinting issues
are; I've made a proposal here, but I'm open to alternative
suggestions.

There's also the question of whether these comments should
constitute a formal objection to the charter.  I think I'm leaning
against, but could also be persuaded otherwise.

-David

=====

We're glad to see the plan to merge Navigation Timing into Resource
Timing after level 2 is complete.  However, this only partially
addresses our concerns about confusing cross-references and
monkeypatching between a number of the specifications produced by this
working group.  It would be good to also see User Timing and Performance
Timeline merged into the same set of specifications in the next level.

A number of the group's specifications have significant privacy
implications:  they might provide mechanisms for finding information
about what other software is running on the user's computer, whether
that's web content in other origins, or entirely separate software.
This requires careful consideration of whether these features are safe.
It would be good to see the Success Criteria section of the charter both 
explicitly ask the group to consider these issues, and explicitly say
that it is an acceptable result for the group to decide not to release a
specification because an acceptable solution for user privacy cannot be
found.

Likewise, some specifications in the group provide significant
additional fingerprinting surface.  When they do this, they should
explicitly point out that they are doing so, and explicitly allow
implementations to take countermeasures.  We'd like to see the Success 
Criteria section of the charter encourage the group to consider 
fingerprinting explicitly.

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                          https://www.mozilla.org/   𝄂
             Before I built a wall I'd ask to know
             What I was walling in or walling out,
             And to whom I was like to give offense.
               - Robert Frost, Mending Wall (1914)

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