[tbb-bugs] #30318 [Applications/Tor Browser]: Integrate snowflake into mobile Tor Browser alpha

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#30318: Integrate snowflake into mobile Tor Browser alpha
-----------------------------------------------+---------------------------
 Reporter:  gk                                 |          Owner:  tbb-team
     Type:  enhancement                        |         Status:
                                               |  needs_review
 Priority:  Medium                             |      Milestone:
Component:  Applications/Tor Browser           |        Version:
 Severity:  Normal                             |     Resolution:
 Keywords:  tbb-mobile, TorBrowserTeam202005R  |  Actual Points:
Parent ID:  #19001                             |         Points:
 Reviewer:                                     |        Sponsor:
                                               |  Sponsor28-must
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Comment (by cohosh):

 I started using this build as my default browser on mobile. So far, I've
 noticed the following:

 - It works great when I'm on wifi. I can browse to sites pretty quickly,
 and continues to work when I leave and come back later :)

 - I still haven't gotten it to work on my cell provider's data network and
 am getting the following error messages:
 {{{
 - Starting Tor client… complete.
 - NOTICE: Bootstrapped 1% (conn_pt): Connecting to pluggable transport
 - NOTICE: Bootstrapped 2% (conn_done_pt): Connected to pluggable transport
 - NOTICE: Bootstrapped 10% (conn_done): Connected to a relay
 - NOTICE: Unknown line received by managed proxy (ice ERROR: 2020/05/29
 17:00:19 error processing checkCandidatesTimeout handler the agent is
 closed).
 - NOTICE: Delaying directory fetches: No running bridges
 - TorService is shutting down
 }}}

 This has happened every time I've tried to connect on data so far, and the
 `ice Error` bit makes me think it's not just the NAT problem from #33666.
 I wonder whether UDP/STUN/P2P traffic is disabled on data connections by
 default?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30318#comment:7>
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