[tor-bugs] #26540 [Applications/Tor Browser]: Enabling pdfjs disableRange option prevents pdfs from loading

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#26540: Enabling pdfjs disableRange option prevents pdfs from loading
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     Reporter:  pospeselr            |      Owner:  pospeselr
         Type:  defect               |     Status:  assigned
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  ff60-esr,
     Severity:  Normal               |  TorBrowserTeam201806
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:                       |
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 In ESR52, range-based requests in pdf.js (which allows pdfs to render-as-
 load)  go out on the default circuit as the relevant code was running in
 the System security context.  To 'fix' the issue, we simply disabled
 range-based request with the 'pdfjs.disableRange' option.  However, in
 ESR60 based Tor Browser, enabling this option prevents PDFs from loading
 at all.  Without the option enabled, PDFs load and render, but the range-
 based requests still go out on the default circuit.

 Original bug: https://trac.torproject.org/projects/tor/ticket/15599

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26540>
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