[tor-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
--------------------------------------+--------------------------
 Reporter:  mcs                       |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
--------------------------------------+--------------------------
Description changed by mcs:

Old description:

> 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.

New description:

 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.

--

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27357#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online