Please provide an option to combine the two commands or have an option to quit Firefox completely when Command+W is hit.
Reason being that when Command+W is hit, the user expects Firefox to quit and next time they open it, the tabs would restore with it. Instead we get a new window with nothing on it. I found out that Command+Q has to be hit for this behaviour otherwise Firefox just sits active in the dock without the tabs to restore. This is confusing behaviour and would prefer the buttons to do the same job given an option.
A more advance function could be Command+W can keep Firefox in the dock with suspended tabs?