[tor-qa] marionette tests - how?

Hi Nicolas, I saw you added Marionette tests to TBB test suite. I wonder how did you get Marionette to work with ESR38. I get "Missing marionetteProtocol field in handshake" error when I initialize webdriver with marionette capability using either TB 5.5.4 or stock ESR38 as firefox_binary [1]. The same code works with Firefox 45. I see this firefox-ui-tests submodule checked out to a commit in Oct. 2015. Is this the secret sauce? And I can't see "wires" mentioned in the test suite. Is it installed on the test machines already, or is there a way to do without wires? Thanks a lot! Gunes [1]: https://gist.github.com/gunesacar/81ce3d54d3ea0e797102f8c302c6ab82#file-mari...