[tbb-bugs] #26355 [Applications/Tor Browser]: Make sure only Windows users on Windows7+ are trying to use Tor Browser based on ESR60

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#26355: Make sure only Windows users on Windows7+ are trying to use Tor Browser
based on ESR60
--------------------------------------------+--------------------------
 Reporter:  gk                              |          Owner:  tbb-team
     Type:  enhancement                     |         Status:  new
 Priority:  High                            |      Milestone:
Component:  Applications/Tor Browser        |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  ff60-esr, TorBrowserTeam201806  |  Actual Points:
Parent ID:                                  |         Points:
 Reviewer:                                  |        Sponsor:
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Comment (by boklm):

 For a), it seems we could use the `minSupportedOSVersion` attribute that
 was added in #13047.

 I see that the updater is checking `minSupportedOSVersion` like this:
 {{{
   if (update.hasAttribute("unsupported")) {
     this.unsupported = ("true" == update.getAttribute("unsupported"));
   } else if (update.hasAttribute("minSupportedOSVersion")) {
     let minOSVersion = update.getAttribute("minSupportedOSVersion");
     try {
       let osVersion = Services.sysinfo.getProperty("version");
       this.unsupported = (Services.vc.compare(osVersion, minOSVersion) <
 0);
     } catch (e) {}
   }
 }}}

 So we need to find what is the value of
 `Services.sysinfo.getProperty("version")` on Windows 7.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26355#comment:2>
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