[tor-bugs] #16300 [Tor Browser]: Make sure the BroadcastChannel API adheres to our URL bar domain isolation

[Tor Bug Tracker & Wiki]

#16300: Make sure the BroadcastChannel API adheres to our URL bar domain isolation
---------------------------------------+--------------------------
 Reporter:  gk                         |          Owner:  tbb-team
     Type:  task                       |         Status:  new
 Priority:  major                      |      Milestone:
Component:  Tor Browser                |        Version:
 Keywords:  ff38-esr, tbb-linkability  |  Actual Points:
Parent ID:                             |         Points:
---------------------------------------+--------------------------
 The BroadcastChannel API allows cross-site communication within the same
 origin. We have a stronger notion of "same origin": the same URL bar
 domain. Thus, we must restrain this API to make it adhere to our URL bar
 isolation scheme.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16300>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online