Firestar's powers and abilities
Microwave Energy Generation
ability to tap into Earth's electromagnetic field and convert it into microwave radiation emissions, which she can utilize in different ways. Microwaves are comparatively short waves of electromagnetic energy. Firestar continually absorbs microwave energy from her environment, including microwave energy from the stars, and continually broadcasts it at low levels.
Microwave Energy Manipulation
In order to use her microwave energy for specific purposes, Firestar must mentally concentrate, thus causing the microwaves to swirl about her body, creating a visible aura around her. In order to project the microwave energy towards a specific target, she must mentally "push" some of the energy swirling around her towards that target. She can focus microwaves on a specific target, and cause it to burst into flame, or explode, or melt. She can also sense microwave signals (such as cell-phone signals or even remote-control devices) and disrupt electronics with her own microwave emissions.
Microwave Emission Heat
Firestar can use her microwave energy to generate intense heat. At this point she can already melt a metal object the size of a cannon almost instantly. She has flown towards a thick wall of solid rock and melted through it so quickly that she could continue flying right through the hole she had melted without pausing.
Microwave Emission Flight
By super-heating the air around her, she can surround her self with an aura of flaming plasma, and if she projects her plasma aura downwards in a tightly focused stream, she can generate enough upward thrust to fly at high speeds. Firestar's powers appear to become more powerful when in space, and she was once able to power a massive stargate with virtually no effort. Her maximum speed has yet to be established, but she can already fly quite swiftly and maneuver in flight quite well. She can generate enough propulsive force to carry considerable weights to great heights at high speed. For example, she has carried Colossus, in his metal-like form, which weighs 500 pounds, high into the air.
Microwave Emission Immunity
Firestar is apparently immune to the microwaves she emits, although she did undergo tests with Henry Pym to make sure.
At present Firestar is still in the process of learning how to use her powers. Moreover, she is still quite young, and the strength of her powers will surely increase as she reaches adulthood. Hence, the full extent of Firestar's powers has yet to be determined.