[tor-bugs] #21778 [Applications/Tor Browser]: Canvas prompt is not showing up anymore in Tor Browser based in ESR52

[Tor Bug Tracker & Wiki]

#21778: Canvas prompt is not showing up anymore in Tor Browser based in ESR52
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  ff52-esr
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Going to https://github.com gives regularly the canvas prompt asking users
 what to do with a website wanting to access the canvas.

 This is not happening anymore with an ESR52 based Tor Browser. Other sites
 are probably affected as well.

 The blocking note is still visible on the browser console, though.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21778>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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