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

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#8270: Exempt @font-face fonts from font limits; prefer them over local fonts
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 Reporter:  mikeperry                                                   |          Owner:  mikeperry
     Type:  enhancement                                                 |         Status:  new      
 Priority:  major                                                       |      Milestone:           
Component:  Firefox Patch Issues                                        |        Version:           
 Keywords:  tbb-fingerprinting, tbb-usability-website, MikePerry201302  |         Parent:           
   Points:                                                              |   Actualpoints:           
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 Our font limiting patch currently applies its limits to both local and
 remote fonts. Before #7937, this was fine, because we blocked remote
 fonts. However, now that we've decided to lift that block, we should
 exempt @font-face fonts from our limits, since they don't contribute to
 fingerprinting. Additionally, if they are present in a font rule that also
 contains local fonts, they should be used instead of local fonts.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8270>
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