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[tor-bugs] #13575 [Tor Browser]: Disable randomised Firefox HTTP cache decay user test groups
#13575: Disable randomised Firefox HTTP cache decay user test groups
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Reporter: isis | Owner: tbb-team
Type: defect | Status: new
Priority: normal | Milestone:
Component: Tor Browser | Version:
Keywords: tbb-pref, tbb-fingerprinting | Actual Points:
Parent ID: | Points:
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I need to look into it more, but I think we should be setting
`browser.cache.frecency_experiment` to `-1` to
[https://bugzilla.mozilla.org/show_bug.cgi?id=986728#c3 disable
HTTP_CACHE_MISS_HALFLIFE_EXPERIMENT]. Since we have Telemetry disabled, of
course, Mozilla's experiment shouldn't be collecting any data on our
users. However, if that pref is not set in `firefox.js` to `-1`, it will
default to `0`. And if it's `0`, then it's randomised between `1` and `4`
inclusive, setting different HTTP cache decay times for the four groups,
which might make for a bit of a rough-edged fingerprinting mechanism.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13575>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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