[tbb-bugs] #29246 [Applications/Tor Browser]: WebGL is sometimes blocked outright instead of put behind a click-to-play placeholder

[Tor Bug Tracker & Wiki]

#29246: WebGL is sometimes blocked outright instead of put behind a click-to-play
placeholder
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  noscript, tbb-usability-website,     |  Actual Points:
  TorBrowserTeam201903, GeorgKoppen201903,       |
  tbb-8.5-must-alpha                             |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by cypherpunks):

 I think a similar thing happens with videos, at Safest security level if I
 visit a page that contains a video, it tells me no videos with supported
 format are found with no click-to-play option, if I copy the video link
 and visit it directly, then I can click-to-play as expected. When I visit
 the same page with an older Tor Browser (ESR52) I can click to play
 directly on the page.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29246#comment:7>
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