Yes and no.I just started framing my place and have placed fire blocks in the between the studs at 48 inches high all long exterior walls, but am wondering do i have to do the same for interior walls?
That's one benefit, but the greater benefit of horizontal blocking is the additional shear strength the wall gets from having the horizontal edges of the exterior sheathing blocked and nailed off. It increases the wall's racking resistance significantly.Its my personal opinion that bracing (fireblock?) at the 4' level is a good idea as it will keep the studs from twisting and popping the drywall screws.
However, your electrician will hate you for doing this!