[tor-bugs] #26146 [Applications/Tor Browser]: Setting `general.useragent.override` does not spoof the platform part anymore in ESR 60 which is confusing

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#26146: Setting `general.useragent.override` does not spoof the platform part
anymore in ESR 60 which is confusing
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ff60-esr, tbb-fingerprinting-os,     |  Actual Points:
  tbb-8.0-issues                                 |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by tom):

 Replying to [comment:38 mcs]:
 > I am not sure what the next step is; it looks like it will not be
 trivial to create a shippable patch (since `Navigator::GetUserAgent()`
 expects to get the userAgent string from the HTTP protocol handle, but we
 want HTTP to use a spoofed `User-Agent`).


 I'm not sure what OSCPU is supposed to be without fingerprinting; but in
 RFP mode, it's the same as User Agent. So if RFP is enabled; you could go
 grab the value from Navigator::GetOscpu and return that instead of
 querying the HTTP header...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26146#comment:39>
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