remove obsolete HTTP pipelining prefs
As of Firefox 54, support for HTTP 1.x pipelining was removed. We should remove the related preference values from browser/app/profile/000-tor-browser.js (network.http.pipelining and its neighbors).
As of Firefox 54, support for HTTP 1.x pipelining was removed. We should remove the related preference values from browser/app/profile/000-tor-browser.js (network.http.pipelining and its neighbors).