[tor-bugs] #15703 [Tor Browser]: Isolate mediasource: URI to first party domain

[Tor Bug Tracker & Wiki]

#15703: Isolate mediasource: URI to first party domain
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     Reporter:  mikeperry    |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  ff38-esr, tbb-linkability
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by arthuredelstein):

 In #15502, to save time, we disabled `URL.createObjectURL(...)` in Web
 Workers. For FF38, we should try to rewrite this patch to  properly
 isolate blob URLs to first party domain in Web Workers rather than
 disabling them.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15703#comment:2>
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