[tor-bugs] #6786 [Firefox Patch Issues]: Clamp CSS media query for color and disable system colors (was: Clamp CSS media query for color)

[Tor Bug Tracker & Wiki]

#6786: Clamp CSS media query for color and disable system colors
----------------------------------+-----------------------------------------
 Reporter:  mikeperry             |          Owner:  mikeperry
     Type:  defect                |         Status:  new      
 Priority:  major                 |      Milestone:           
Component:  Firefox Patch Issues  |        Version:           
 Keywords:  tbb-fingerprinting    |         Parent:           
   Points:                        |   Actualpoints:           
----------------------------------+-----------------------------------------
Changes (by mikeperry):

 * cc: shondoit (added)
  * priority:  normal => major


Comment:

 It's also now apparently possible to query system colors directly through
 the HTML5 canvas:
 http://eb0b428b.byethost7.com/screen.html

 #6253 might be one way to block that, but there may be other vectors (like
 trial and error through direct DOMNode comparison).

 Apparently, there are several prefs that already exist around
 Native/System color lookup. The main one seems to be ui.use_native_colors,
 but it is cached by the style system at startup (so you need a restart to
 test its effects, which is painful). I'm not sure exactly what effect it
 has yet.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6786#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online