Apparently the workaround for only fullscreening into pane used for
chromium depends on its buggy behaviour and does not work with firefox
(which instance is Navigator instead of firefox anyways). As an
alternative there now is a new keybind to switch from fullscreen into
this 'fakefullscreen'. To switch back one must go into normal fullscreen
again. Therefore this still could use some rework.
herbstluftm 0.7.0-2 on debian does not ship a completely functioning
dmenu_run-wrapper, but it is probably better to just temporarily copy
the working script from github into ~/bin until it is fixed in debian.
(As of now dmenu_run_hlwm will not pass any option to dmenu_run.)
