[tor-bugs] #21741 [Applications/Tor Browser]: Check for proxy bypasses with new HTML Drag and Drop API

[Tor Bug Tracker & Wiki]

#21741: Check for proxy bypasses with new HTML Drag and Drop API
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     Reporter:  gk                   |      Owner:  tbb-team
         Type:  task                 |     Status:  new
     Priority:  High                 |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  ff52-esr, tbb-7.0-must,
     Severity:  Normal               |  TorBrowserTeam201703
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:  Sponsor4             |
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 We had issues in the past with drag and drop bypassing our proxy settings.
 There is a new API that got implemented which can do the things the old
 one did and more (see:
 https://bugzilla.mozilla.org/show_bug.cgi?id=906420,
 https://bugzilla.mozilla.org/show_bug.cgi?id=1289255, and
 https://bugzilla.mozilla.org/show_bug.cgi?id=1298243). We should assure
 that our old defense against proxy bypass holds.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21741>
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