[tor-bugs] #21569 [Applications/Tor Browser]: Investigate and neuter fingerprinting potential of Permissions API

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#21569: Investigate and neuter fingerprinting potential of Permissions API
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 Reporter:  gk                                   |          Owner:
                                                 |  arthuredelstein
     Type:  task                                 |         Status:
                                                 |  needs_information
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ff52-esr, TorBrowserTeam201704R,     |  Actual Points:
  tbb-7.0-must-alpha                             |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Changes (by mcs):

 * status:  needs_review => needs_information


Comment:

 Kathy and I started to review this but got stuck on a couple of things:
 * Where is the file `file_firstPartySpecial.html`?
 * Should the commented out lines (e.g., for geolocation) be removed from
 `browser_permissions.js`?
 * `PrincipalOriginAttributes::StripUserContextId()` is now an empty
 function. Is that correct?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21569#comment:9>
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