[tbb-bugs] #22788 [Applications/Tor Browser]: Tor Browser rendering hangs when downloading large PDFs

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#22788: Tor Browser rendering hangs when downloading large PDFs
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 Reporter:  teor                      |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Changes (by teor):

 * status:  needs_information => new


Comment:

 Replying to [comment:3 gk]:
 > Replying to [comment:2 teor]:
 > > Replying to [comment:1 cypherpunks]:
 > > > Isn't this expected since JIT is disabled in those higher security
 settings? Or should there be a whitelist for anything `pdf.js` (at least
 for the Medium security setting)?
 > >
 > > No, this seems to happen to *other* tabs only while the PDF is
 downloading, and not once it's loaded. I don't see why other tabs should
 be affected in 7.0.1 / multiprocess at all. But it seems worse than the
 6.0 series, not better.
 >
 > With "downloading" do you mean getting the external helper app dialog
 and then downloading the file to disk or do you mean just loading the file
 into your browser over the Internet? Do the two scenarios behave
 differently for you?

 Yes. I only see the issue when loading the file into the embedded PDF
 viewer.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22788#comment:4>
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