-r mozbase_requirements.txt ../tools/wptserve ../tools/wpt_third_party/certifi ../tools/wpt_third_party/enum ; python_version < '3' ../tools/wpt_third_party/h2 ../tools/wpt_third_party/hyperframe ../tools/wpt_third_party/hpack ../tools/wpt_third_party/pywebsocket3 ../marionette/client ../marionette/harness