use an appropriate value for network.http.sendOriginHeader
From #33534 (closed): In Firefox 70, the network.http.sendOriginHeader
pref value was changed from 0
(never send Origin header) to 2
(always send). What value should Tor Browser use?
https://bugzilla.mozilla.org/show_bug.cgi?id=1424076
"Enable network.http.sendOriginHeader by default"