[tbb-bugs] #27357 [Applications/Tor Browser]: allow @2x and @2x images to be used on about:tor

[Tor Bug Tracker & Wiki]

#27357: allow @2x and @2x images to be used on about:tor
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     Reporter:  mcs                       |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Currently, we cannot use @2x and @3x images on about:tor. This is because
 when `privacy.resistFingerprinting` is `true` the display density is
 spoofed to always be 1.0, e.g., a selector like the following is never
 activated:
   @media (min-resolution: 2dppx) {
     #search-button {
       background-image:
 url('chrome://torbutton/skin/forwardArrow@2x.png');
     }
   }

 We should figure out how to allow an exception for about:tor and other
 internal (but not chrome) pages.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27357>
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