[tor-bugs] #8270 [Firefox Patch Issues]: Exempt @font-face fonts from font limits; prefer them over local fonts

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Mon Mar 18 00:22:02 UTC 2013


#8270: Exempt @font-face fonts from font limits; prefer them over local fonts
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    Reporter:  mikeperry             |       Owner:  mikeperry                                                 
        Type:  enhancement           |      Status:  closed                                                    
    Priority:  major                 |   Milestone:                                                            
   Component:  Firefox Patch Issues  |     Version:                                                            
  Resolution:  fixed                 |    Keywords:  tbb-fingerprinting, tbb-usability-website, MikePerry201302
      Parent:                        |      Points:                                                            
Actualpoints:  15                    |  
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Comment(by gacar):

 Hi,

 Font-face rules may have local URL's (src/local) and this may be used to
 load unlimited number of local fonts per document. See demo at:
 http://jsfiddle.net/C4t7w/13/

 When I visit above URL with TBB 2.3.25-5 on Ubuntu 12.04 (with default
 settings) I can see my local fonts loaded (more than 5 of them).

 Also, font-face's local/url fallback mechanism may be used to report fonts
 that are not found on the system. All without JS.

 Adding some JS, one can possibly enumerate fonts with width-height
 ("flippingtypical") detection.

 See '''<uri> at''' https://developer.mozilla.org/en-US/docs/CSS/@font-
 face#Values

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8270#comment:2>
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