from webbrowser import _browsers, _tryorder, Mozilla, register if "firefox" in _tryorder: class NewFirefox(Mozilla): """Launcher class for Mozilla Firefox browsers with versions >= 36.0.""" remote_args = ['%action', '%s'] remote_action = "" remote_action_newwin = "-new-window" remote_action_newtab = "-new-tab" _browsers["firefox"] = [None, NewFirefox("firefox")]