[tor-bugs] #24553 [Applications/Tor Browser]: Re-enable Alternate Services

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#24553: Re-enable Alternate Services
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     Reporter:  arthuredelstein           |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  ff59-esr
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Mozilla patched Alternate Services (Alt-Svc) to have first-party
 isolation:
 https://bugzilla.mozilla.org/1334690, effective Firefox 54. We disabled
 Alt-Svc , but in TBB/ESR59 we can potentially re-enable it.

 We also need to examine if there are other related headers or mechanisms
 that could act as supercookie vectors. (Patrick McManus mentioned alt-used
 as a possibility.) If there are, then those need to be isolated as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24553>
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The Tor Project: anonymity online