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[tor-bugs] #2872 [Tor bundles/installation]: Limit the fonts available in TorBrowser



#2872: Limit the fonts available in TorBrowser
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 Reporter:  mikeperry                 |          Owner:  mikeperry
     Type:  enhancement               |         Status:  new      
 Priority:  normal                    |      Milestone:           
Component:  Tor bundles/installation  |        Version:           
 Keywords:                            |         Parent:  #2871    
   Points:                            |   Actualpoints:           
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 According to the Panopticlick data set, the font list (which they obtained
 through plugins) was the second most identifiable chunk of data they saw,
 behind plugins themselves. We block plugins, but fonts are still available
 through CSS.

 There are seemingly two potential ways to solve this:
 1. Ship with a fixed set of fonts in TorBrowser
 2. Limit the number of fonts that can be loaded on a single page

 Because of the wide variety of languages we support, and because we'd like
 this feature merged upstream in Firefox, I think the way to do this is is
 #2. The maximum number of fonts per page should be governed by an
 about:config setting.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2872>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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