[tbb-bugs] #20436 [Applications/Tor Browser]: webm video plays from 4chan even though it should be blocked from playing

[Tor Bug Tracker & Wiki]

#20436: webm video plays from 4chan even though it should be blocked from playing
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     Reporter:  Dbryrtfbcbhgf             |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  High                      |  Milestone:
    Component:  Applications/Tor Browser  |    Version:  Tor: 0.2.8.7
     Severity:  Major                     |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 webm video plays from 4chan even though it should be blocked from playing.
 I clicked on a webm video on 4chan and it played but I had tor security
 settings set to high and no other settings were changed. I attached the
 webm video. "the video is a SFW prank video" Torbrowser 6.0.5

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Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/20436>
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