I know that I can start Firefox in remote controllable state as follows:
Close all instances of Firefox
Start Firefox with the poorly documented --marionette command line switch:
"c:\Program Files\Mozilla Firefox\firefox.exe" --marionette
Firefox will start, and apart from the little robot icon, and the quite annoying pink/gray stripes over the address bar, it will operate normally.
Is there any way to hide those pink/gray stripes?