[tor-bugs] #30264 [Obfuscation]: Revise list of default Tor Browser bridges

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#30264: Revise list of default Tor Browser bridges
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     Reporter:  phw          |      Owner:  phw
         Type:  enhancement  |     Status:  assigned
     Priority:  Medium       |  Milestone:
    Component:  Obfuscation  |    Version:
     Severity:  Normal       |   Keywords:  tbb-bridges
Actual Points:               |  Parent ID:
       Points:  0.5          |   Reviewer:
      Sponsor:               |
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 Six of our
 [https://trac.torproject.org/projects/tor/wiki/doc/TorBrowser/DefaultBridges
 default Tor Browser bridges] are now gone for good:

 * Over at
 [https://trac.torproject.org/projects/tor/ticket/28521#comment:12 #28521],
 kpdyer mentioned that he's no longer able to manage his three bridges.
 * Paul Pearce is also no longer able to maintain the two bridges that were
 set up at Berkeley.
 * A bridge that was originally set up by Henry de Valence is also no
 longer alive.

 I suggest that we remove all of these bridges.  The question is: do we
 want replacements? Roger mentioned on IRC that we may be able to get a
 bunch of people to run fast bridges for us.

 As for the current state of our default bridges:
 [https://metrics.torproject.org/rs.html#search/ndnop ln5's obfs4 bridges]
 hover around 70% bandwidth utilisation while
 [https://metrics.torproject.org/rs.html#details/11A3982C417AF37230F576006405BE5338F41C09
 tvdw's obfs4 bridge] sees around 100% utilisation. Interestingly,
 [https://metrics.torproject.org/rs.html#details/7171D44C4CEB16D4972ABAC43E199D03FADFD679
 one bridge] sees continuous growth in both bandwidth and users while
 [https://metrics.torproject.org/rs.html#details/D9C805C955CB124D188C0D44F271E9BE57DE2109
 another bridge] sees a decline in users. While it seems tricky to assess
 the overall health of our default bridges, I think it would be a good idea
 to add a few new bridges.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30264>
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