Can you tell me a little bit more about these? I am not familiar with them.
In malls the units generally vent smoke out into the mall, and up and out of smoke vents. Some times this is not possible so the shop units will need fire resistant shop fronts, sometimes simply shutters as Galeon points out, and sometimes they will still want glass shop fronts for people to see into the shop/see the window display. When this is the case they generally have smoke extract sucking the smoke out of the back of the shop, and sprinkler heads located at the windows that have the specific task of cooling the window so it does not break. These sprinkler heads are usually mounted at 90 degrees to the norm to give spray coverage over the window.
FWIW, people shouldn't put posters on the inside of these windows because then the window can heat at different temperatures causing thermal shock, which can crack the window. (Apparently)
Smoke curtains are there to stop the passage of smoke or direct smoke to a certain area. These should not be confused with the FR shutters, which give a level of compartmentation and tend to need to drop all the way to the floor.
