[tor-bugs] #33452 [Applications/Tor Browser]: Ensure that the PrivacyPass extension is able to get passes (if installed)

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#33452: Ensure that the PrivacyPass extension is able to get passes (if installed)
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     Reporter:  jnewsome                  |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  cloudflare,mitm
Actual Points:                            |  Parent ID:  #24321
       Points:                            |   Reviewer:
      Sponsor:                            |
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 On TBB 9.0.5, "standard" security, using PrivacyPass 2.0.4, on Ubuntu
 18.04 when I try to get passes I get a long sequence of Captcha's to
 solve. Eventually it stops serving Captcha's and I get a green check mark
 as if I had passed, but the extension still shows no passes acquired.

 In Firefox on the same machine, using Tor naively through a socks proxy,
 Privacy Pass WAI. This seems to support that the issue is specific to TBB
 rather than PrivacyPass / Cloudflare's treatment of Tor traffic itself.

 See also the PrivacyPass bug https://github.com/privacypass/challenge-
 bypass-extension/issues/99 for this issue. Also possibly-related bug that
 PrivacyPass doesn't work when the browser spoofs the user-agent string:
 https://github.com/privacypass/challenge-bypass-extension/issues/106

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33452>
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