Firefox no url bar, nor title ba

gistfile1.md

steps

1. install simplefox
2. add new line in the userChrome.css

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#navigator-toolbox {
    height: 0px !important;
    min-height: 0px !important;
    overflow: hidden !important;
}

#navigator-toolbox:focus,
#navigator-toolbox:focus-within,
#navigator-toolbox:active {
    height: auto !important;
}