[tor-bugs] #18195 [Tor Browser]: Add a flag to identify Tor Browser in JS

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue Feb 2 16:24:04 UTC 2016

#18195: Add a flag to identify Tor Browser in JS
 Reporter:  pento        |          Owner:  tbb-team
     Type:  enhancement  |         Status:  new
 Priority:  Medium       |      Milestone:
Component:  Tor Browser  |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
  Sponsor:               |

Comment (by cypherpunks):

 There is no need for using canvas. Rendered font metrics can be detected
 via Javascript or CSS. So placeholders can be detected that way.

 TBB is not the only canvas-blocking browser. There are generic browser
 addons that block canvas reading on non-TBB browsers.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18195#comment:7>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

More information about the tor-bugs mailing list