[tbb-bugs] #21675 [Applications/Tor Browser]: Set window.navigator.hardwareConcurrency to a constant value

[Tor Bug Tracker & Wiki]

#21675: Set window.navigator.hardwareConcurrency to a constant value
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 Reporter:  gk                            |          Owner:  tbb-team
     Type:  defect                        |         Status:  new
 Priority:  Medium                        |      Milestone:
Component:  Applications/Tor Browser      |        Version:
 Severity:  Normal                        |     Resolution:
 Keywords:  tbb-fingerprinting, ff52-esr  |  Actual Points:
Parent ID:                                |         Points:
 Reviewer:                                |        Sponsor:  Sponsor4
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Description changed by gk:

Old description:

> We should avoid leaking the amount of CPUs a user has available by asking
> `window.navigator.hardwareConcurrency`. Not sure which value we should
> give back and if we should return the same one for all users.

New description:

 We should avoid leaking the amount of cores a user has available by asking
 `window.navigator.hardwareConcurrency`. Not sure which value we should
 give back and if we should return the same one for all users.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21675#comment:2>
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