[tor-bugs] #33021 [Applications/Tor Browser]: Sync tabs between Tor Browser instances

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#33021: Sync tabs between Tor Browser instances
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     Reporter:  sysrqb                    |      Owner:  tbb-team
         Type:  enhancement               |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
                                          |  TorBrowserTeamTriaged
Actual Points:                            |  Parent ID:
       Points:  10                        |   Reviewer:
      Sponsor:                            |
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 We can think about synchronizing (some) open tabs between Tor Browser
 instances by each instance creating and registering onion services with
 other instances. The first iteration of this doesn't need to be crazy
 where we synchronize the exact viewport location of each page between
 instances, and it shouldn't synchronize all open tabs by default.

 But, it'd be neat if we could select a tab in the browser and choose to
 which other Tor Browser instance that URL should be sent. The URL should
 not be opened automatically in the other instance, but it should be listed
 "somewhere" in the UI. If one wants to open one of the synced tabs, then
 they can open the list and select it.

 To some degree this has the ricochet problem but it shouldn't be nearly as
 bad. The worse tradeoff is that both Tor Browser instances must be online
 at the same time. This could work well enough for desktop->mobile, but
 it'll be harder in some situations for desktop->desktop, and
 mobile->desktop.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33021>
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