[tbb-bugs] #16340 [Tor Browser]: Verify that performance.now() in worker context has reduced time precision as well

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#16340: Verify that performance.now() in worker context has reduced time precision
as well
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 Reporter:  gk                                   |          Owner:  tbb-
     Type:  task                                 |  team
 Priority:  normal                               |         Status:  new
Component:  Tor Browser                          |      Milestone:
 Keywords:  ff38-esr, tbb-fingerprinting-time-   |        Version:
  highres                                        |  Actual Points:
Parent ID:                                       |         Points:
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 https://bugzilla.mozilla.org/show_bug.cgi?id=908390 makes
 `performance.now()` available in the worker context. We should verify that
 reducing the precision of it is working there as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16340>
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