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Re: [tor-bugs] #8270 [Firefox Patch Issues]: Exempt @font-face fonts from font limits; prefer them over local fonts
#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>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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