[tor-bugs] #25945 [Applications/Tor Browser]: Investigate postponing tracker requests for possible (fingerprinting) risks

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#25945: Investigate postponing tracker requests for possible (fingerprinting) risks
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  task                      |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  ff60-esr
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 In https://bugzilla.mozilla.org/show_bug.cgi?id=1358060 Mozilla
 implemented a feature which delays requests Firefox deems to be stemming
 from trackers (see: https://www.janbambas.cz/firefox-57-delays-requests-
 tracking-domains/ for more details).

 This is thought of having performance improvements but can as well lead to
 sites being loaded worse depending on how they are built.

 We have disabled Firefox's tracking protection as we want to provide
 privacy by design and there are other features of those lists we don't
 like. We should investigate whether:

 a) tracking protection gets used through the backdoor with this new
 feature
 b) if so, what this means for the privacy properties we care about
 c) if so, if we think that's okay with our current policies regarding
 list-based tracker tracking
 d) if not, whether we should activate it as Firefox does

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25945>
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