Саботажная команда даже не скрывает своих намерений:
> Mozilla intends to upstream a patch from Tor that will definitively violate the spec. We intend to match Tor's behavior of reporting one system via the HTTP Header no matter what platform the user is on; but report the correct platform in the navigator object in Javascript. This is Tor #26146 and https://gitweb.torproject.org/tor-browser.git/patch/?id=511d1d8
> So we could use this bug to resolve this issue; but it's more likely we will wontfix this in favor of a new bug dealing strictly with the behavior we intend to enable.
https://bugzilla.mozilla.org/show_bug.cgi?id=1499478#c4