Norfair

Shinebreak

Used in the 100% run on the way to Hi Jump. Saves a second or two in Normal Mode, saves a bit more time in Hard Mode.

Newfair Spark

One of the routing choices for 100% involve going down into Norfair first and saving the Ice Beam as one of the last items, and this route is called the Newfair route. There is a difficult shinespark which saves enough time to make this route a viable option, so because this trick ended up defining the route it became known as the Newfair Spark.

After collecting the Energy Tank behind the caterpillar miniboss, you need to run back enough to have enough room to get a speedbooster going into the next room. I like to jump into the corner of the ceiling the drops to the left because it sets up a nice consistent distance that doesn't require running all the way to the left. You need to be holding a charge shot going into the door, so you can open the door early by firing a missile at it and then holding charge, or you can time a beam shot right as samus's sprite touches the first purple plant behind the caterpillar's pupa and holding charge when the shot is fired. You don't need a fully charged beam entering the door, just enough of a charge started that samus will automatically fire the shot when you enter the next room after letting go of B during the door transition.

When you enter the next room after letting go of B during the door transition, samus should automatically fire a shot that breaks the block in the way and you should start your speedbooster animation around the same time if you did the ceiling setup. Here you need to perform a Shine Break by pressing down to store your shinespark late enough that the speedblock in the floor breaks, but early enough that you don't fall off the ledge. The next step is collecting the missile below because you can't shoot the missile block behind it until it's collected. I like to press down twice when storing the shinespark so that I morph on the ledge above, and roll off the ledge and springball into the missile.

After collecting the missile you need to roll to the right where you can stand up again, face left and shoot out the missile block, then run off the ledge to the right and spark straight up. You need to shoot this missile block because it allows you to fall back to this area later without having to break the speedblocks or climb into the long shortcut room that gets used in any%.