[tbb-bugs] #20915 [Applications/Tor Browser]: Web developer network tab breaks first-party isolation in some cases

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#20915: Web developer network tab breaks first-party isolation in some cases
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 Reporter:  gk                         |          Owner:  tbb-team
     Type:  defect                     |         Status:  new
 Priority:  Medium                     |      Milestone:
Component:  Applications/Tor Browser   |        Version:
 Severity:  Normal                     |     Resolution:
 Keywords:  ff52-esr, tbb-linkability  |  Actual Points:
Parent ID:                             |         Points:
 Reviewer:                             |        Sponsor:
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Comment (by cypherpunks):

 {{{304 Not Modified}}} response for reloading preview image in the Network
 tab leads to bug in torbutton.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20915#comment:2>
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