[tbb-bugs] #26608 [Applications/Tor Browser]: investigate <link rel="preload">

Tor Bug Tracker & Wiki blackhole at torproject.org
Thu Apr 18 20:12:33 UTC 2019

#26608: investigate  <link rel="preload">
 Reporter:  mcs                                  |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-linkability, ff60-esr,           |  Actual Points:
  TorBrowserTeam201904                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:

Comment (by acat):

 AFAIK this is controlled via `network.preload` pref and it is still false
 in current nightly (68). So I would assume that it will be still disabled
 for next ESR release.

 In any case, I enabled the pref in current Tor Browser and tested
 different kinds of 'link-rel preloads' (audio, video, script, style,
 fetch...), and could not find a way to make them bypass the FPI.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26608#comment:14>
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