A Way To Extinguish House Fires?

[Clark W Griswold]

Even if you got the dome over the fire it would still burn until all oxygen under the dome was consumed. If somehow you could seal it and the fire runs out of oxygen you still risk an explosion when you lift the dome off and introduce all of that oxygen to unburned gasses and fuel.

Also, you would still need firefighters to go in and try to check for/rescue people who may be trapped inside before dropping the dome.