[tor-bugs] #18144 [Tor Browser]: about:tor update arrow position is wrong (Retina and zoom)

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#18144: about:tor update arrow position is wrong (Retina and zoom)
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     Reporter:  mcs          |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  Medium       |  Milestone:
    Component:  Tor Browser  |    Version:
     Severity:  Normal       |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |    Sponsor:
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 In the candidate builds of Tor Browser 5.5 and 6.0a1, the update arrow
 does not point to the Torbutton toolbar item on a 2x (Retina) display or
 when content zoom is used.

 I am not sure when this regressed, but it happens because the about:tor
 page receives a spoofed value for window.devicePixelRatio (it is always
 1.0).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18144>
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