Firebird can generate heat and flame, controlling these with molecular precision. She can project heat waves, fire blasts and flame constructs; create powerful winds by manipulating air temperatures; use convection currents and thermal updrafts to carry tremendous weights aloft; and fly fast enough to achieve escape velocity.

She can mentally control any heat or flame in her vicinity, and is physically immune to extreme heat and fire. Firebird has also displayed more mysterious, possibly mystical abilities. She sometimes has visions, can sense the presence of evil (especially supernatural evil), has uncanny intuition, and seems immune to demonic possession. Most remarkably, Bonita may be immortal, having proven miraculously immune to potentially fatal conditions such as the vacuum of space, a universal poison (powerful enough to kill even the Silver Surfer) and massive radiation. The Collector believes she may be one of the few beings in the universe who cannot die.