[tor-bugs] #5798 [Firefox Patch Issues]: Improve persistence and WebFont compatibility of font patch

[Tor Bug Tracker & Wiki]

#5798: Improve persistence and WebFont compatibility of font patch
----------------------------------+-----------------------------------------
 Reporter:  mikeperry             |          Owner:  mikeperry
     Type:  defect                |         Status:  new      
 Priority:  major                 |      Milestone:           
Component:  Firefox Patch Issues  |        Version:           
 Keywords:  tbb-fingerprinting    |         Parent:           
   Points:                        |   Actualpoints:           
----------------------------------+-----------------------------------------

Comment(by mikeperry):

 It's also possible to induce fallback to the default system font, which
 may reveal OS info:
 http://eb0b428b.byethost7.com/screen.html (copy of that source is attached
 to #6786).

 Not sure if that is worth special casing or not. It may be hard to conceal
 OS given access to a dozen fonts, and there are likely to be ways to infer
 OS through other vectors.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5798#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online