Launching options for Sencha Studio embedded Chrome browser

I'm working with Sencha Studio / Sencha Test and everything works well. Strategically we want to execute those tests performant, so the idea was to use a headless browser.

I wonder whether it's possible to run Sencha Studio's embedded Chrome browser in "headless mode" via --headless? Is there a possibility in Sencha Studio and on command line via stc to launch that browser with some custom parameters?

And how about adding Sencha Cmd's PhantomJS to my locally available browsers? Would that be a reasonable alternative?