[tor-bugs] #18113 [Applications/Tor Launcher]: Dynamically allocate clients to default Tor Browser bridges of a certain type

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#18113: Dynamically allocate clients to default Tor Browser bridges of a certain
type
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 Reporter:  isis                               |          Owner:  brade
     Type:  enhancement                        |         Status:
 Priority:  Medium                             |  needs_revision
Component:  Applications/Tor Launcher          |      Milestone:
 Severity:  Normal                             |        Version:
 Keywords:  tbb-bridges, TorBrowserTeam201604  |     Resolution:
Parent ID:                                     |  Actual Points:
 Reviewer:                                     |         Points:
                                               |        Sponsor:
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Comment (by isis):

 Replying to [comment:15 mrphs]:
 > Replying to [comment:11 teor]:
 >
 > > I'm not sure what you mean here, surely there can only be one "first"
 bridge each time Tor Browser launches.
 >
 > If you take a look at `bridge_prefs.js` file, the first obfs4 bridge
 starts with:
 >
 > {{{
 > pref("extensions.torlauncher.default_bridge.obfs4.1", "obfs4...
 > }}}
 > and the second one with
 >
 > {{{
 > pref("extensions.torlauncher.default_bridge.obfs4.2", "obfs4...
 > }}}
 > What happens if they all are `obfs4.1`? Does Tor Browser try to connect
 to all of them at once?

 If they are all `pref("extensions.torlauncher.default_bridge.obfs4.1",
 "obfs4...` then the pref is overwritten each time, and you'd only end up
 with one bridge, because FF prefs are key-values which expect keys to not
 collide.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18113#comment:16>
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