[tor-bugs] #21256 [Applications/Tor Browser]: update tor browser spec for esr52

[Tor Bug Tracker & Wiki]

#21256: update tor browser spec for esr52
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     Reporter:  arthuredelstein           |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 We're doing more first party isolation in esr52, thanks to the hard work
 of our Mozilla friends. Let's update our design and implementation
 document to reflect the changes.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21256>
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