The design of building hallways is partly determined by the number of dwellings on the floor whose occupants may need access to the fire stairs at the same time.
Obviously, if people are having to clamber over couches or move chairs to get to the fire exits, this is a fire risk.
But if the space around the furniture is the same as or greater than the access to your fire exit, then you should be OK.
If in doubt check with your fire safety inspectors or insurers.