Agreed that the bedroom window (at least on ours) would be a real pain to get out of, but if your butt is being singed, it will get "bigger" in a hurry. I have the original fire extinguisher by the front door, for a small kitchen fire. Bought a larger one for the bedroom, as some say to "fight our way out" from up there. I also have a third large one in the basement, right by the opening, in case something happens while outside, to the truck, someone else close by, etc. Also just mounted another smoke detector right over the bed, and another one in the basement, in case something starts "right underneath us" while asleep.
Hopefully will NEVER find out if any of them work (other than testing, of course).