[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:  closed
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:  fixed
 Keywords:  ff52-esr-will-have, tbb-linkability  |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by cypherpunks):

 Indeed, but that's because TBB now fetches images from the network every
 time instead of using the cache. And about:cache shows that there are no
 cached elements, but about:memory shows that they exist
 {{{
 │    │  │  ├──1.07 MB (00.53%) ── memory-
 storage(O^privateBrowsingId=1&firstPartyDomain=torproject.org,p,/M)
 │    │  │  ├──0.01 MB (00.01%) ── disk-
 storage(O^privateBrowsingId=1&firstPartyDomain=torproject.org,p,)
 │    │  │  ├──0.00 MB (00.00%) ── disk-
 storage(O^firstPartyDomain=torproject.org,a,)
 │    │  │  ├──0.00 MB (00.00%) ── memory-
 storage(O^firstPartyDomain=torproject.org,a,/M)
 }}}
 Weird.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20915#comment:4>
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