[tor-bugs] #28720 [Applications/Tor Browser]: NoScript is blocking some videos outright starting with 10.1.9.2rc2 on security leverl "safer"

[Tor Bug Tracker & Wiki]

#28720: NoScript is blocking some videos outright starting with 10.1.9.2rc2 on
security leverl "safer"
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  noscript
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 STR:

 1) Take a clean Tor Browser
 2) Set the security slider level to "safer" (click on the onion in the
 toolbar -> Security Settings... -> drag the slider to the medium level)
 3) Load https://developer.mozilla.org/samples/video/chroma-key/index.xhtml
 4) You get the message "No video with supported format and MIME type
 found." without the option to override this in order to watch the video.

 Expected results:

 The NoScript placeholder allowing to watch the video after clicking on it
 and confirming.

 The last good version is NoScript 10.1.9.2rc1 and the first bad one
 10.1.9.2rc2

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28720>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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