[tbb-bugs] #23463 [Applications/Tor Browser]: Javascript based clocks can tick backwards

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Sep 11 20:01:21 UTC 2017

#23463: Javascript based clocks can tick backwards
     Reporter:  cypherpunks               |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  time javascript
                                          |  clock
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
 In Tor Browser, pages with a clock or timer sometimes appear to count
 backwards, which can cause problems. Firefox does not have the same
 behavior. I suspect this is caused by patches to reduce timer precision.
 Please provide a pref or way to disable this behavior and obtain
 monotonically increasing time with full precision.

 I understand the original reasons for the patch(es) in question, but the
 reduced precision is not good for all purposes.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23463>
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