[tbb-bugs] #23142 [Applications/Tor Browser]: HTML <marquee> elements are broken on goftesh.com in Tor Browsr

[Tor Bug Tracker & Wiki]

#23142: HTML <marquee> elements are broken on goftesh.com in Tor Browsr
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-usability-
                                          |  website
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 It seems Tor Browser is breaking `<marquee>` elements somehow. This got
 reported on our blog
 (https://blog.torproject.org/comment/270124#comment-270124) the example
 being goftesh.com

 This works in Firefox 52 ESR. I flipped the first-party isolation pref and
 things are still working in Firefox 52 ESR. Disabling NoScript, HTTPS-E
 and Torbutton in Tor Browser does not solve the problem. Looking back in
 history this seems to be a bug already included in old Tor Browser
 versions. I tested Tor Browser 4.0 and there the `<marquee>` element is
 broken as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23142>
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