Opened 15 months ago

#25945 new task

Investigate postponing tracker requests for possible (fingerprinting) risks

Reported by: gk Owned by: tbb-team
Priority: Medium Milestone:
Component: Applications/Tor Browser Version:
Severity: Normal Keywords: ff60-esr
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:

Description

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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