[tbb-bugs] #30171 [Applications/Tor Browser]: Always accepting third party cookies seems to break first party isolation

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#30171: Always accepting third party cookies seems to break first party isolation
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  TorBrowserTeam201904, tbb-           |  Actual Points:
  linkability                                    |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by mcs):

 Replying to [comment:2 acat]:
 > Is this pref syncing still logic necessary? If that's not the case, here
 is a patch which just removes this dependency between those two prefs,
 which should solve this issue:
 https://github.com/acatarineu/torbutton/commit/30171

 The patch looks good to me and Kathy (brade). Georg should confirm, but we
 think you are correct that the syncing logic is no longer necessary
 (especially since — as far as I know — in recent versions of Tor Browser
 there is no GUI to allow someone to set `privacy.firstparty.isolate` to
 false).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30171#comment:3>
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