[tor-bugs] #28373 [Applications/Tor Browser]: verify that cubeb-related tmp files do not violate disk avoidance

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#28373: verify that cubeb-related tmp files do not violate disk avoidance
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     Reporter:  mcs                       |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-disk-
                                          |  leak,ff60-esr
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 The following bug caught our eye while reviewing undocumented changes made
 between ESR52 and ESR60 (for #22074):

 https://bugzilla.mozilla.org/show_bug.cgi?id=1407490
 "Ensure cubeb remoting socket has unique name per server process."

 From reading the code in media/audioipc/audioipc/src/lib.rs, it looks like
 temporary files are created in the path returned by `temp_dir()` (which is
 probably /tmp or the %TEMP% directory on Windows). We should see if that
 is true, what data is in the files, and whether they are left behind when
 the browser exits.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28373>
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