[tbb-bugs] #26548 [Applications/Tor Browser]: HTTPS Everywhere's injection of upgrade-insecure-requests header appears to be broken on 8.0a9

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#26548: HTTPS Everywhere's injection of upgrade-insecure-requests header appears to
be broken on 8.0a9
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     Reporter:  cypherpunks               |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 I compared the behavior between 8.0a8 and 8.0a9:

 * Open 8.0a8, and check the "Block all unencrypted requests" in the
 HTTPS-E popup.

 * Go to a mixedcontent website (go to the github repository efforg/https-
 everywhere then search for mixedcontent and find recent edited one, here's
 an example of such a site (not privatebin.net but the one written there):
 https://privatebin.net/?b5c69abb9501c2d5#fbNBF8M+XNeluv6+O00aGLjAWkrcUAnBDsgZLkP0RQY=
 )

 * So open that site up while your browser console is opened, you can see
 that HTTPS-E injects an upgrade-insecure-requests header and everything is
 going through HTTPS now including scripts and css etc.

 ----------------

 * Open 8.0a9, and check the "Block all unencrypted requests" in the
 HTTPS-E popup.

 * Go to the previously mentioned site.

 * There doesn't appear to be any injection of upgrade-insecure-requests
 header, css broken etc as a result.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26548>
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