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one thing I want to say I have a no planet in the fire element (except Chiron) but I don't thing it can be that literal
I doubt it is that literal, but I notice something about your chart: while your fire signs are mostly empty, every single one of your fire houses is occupied. You have Jupiter in the first house, the moon, Uranus, and Neptune in the fifth, and Mars in the ninth. And while your ninth house Mars is in Taurus, it's right at the cusp of Aries, which is a fire sign, and anything on a sign or house cusp has some of the characteristics and motivations of both of the signs or houses that it straddles.
I would suspect that ninth house Taurus/Aries Mars is the culprit. Ninth house=desire for expansion. Mars in Aries=very fiery, militant, possibly willful and/or belligerent, especially if those Martian/Arian instincts meet with hindrance, suppression, and/or frustration. Mars in Taurus=great way to suppress or frustrate Martian energy. Taurus is a very peaceful and rather inwardly directed sign, and also immensely stubborn in holding its ground. Put Mars in it, and those peaceful energies and those militant energies have to work together somehow.
Give that Mars in Taurus a fiery Aries boost, and the relationship between planet and sign becomes something like a strong willed teenager locked into a battle with an equally strong willed parent. Parent says get a traditional haircut, the kind every employer likes, and teenager says no way, I'm growing it out and dyeing it pink and purple and getting a mohawk. Parent says eat your meat and potatoes, and teenager says I'm a vegan. (Or parent says eat this nice healthy vegetarian food and teenager says I'm going to McDonald's.)
In the human psyche, that plays out as competing instincts. With Mars in Taurus, you probably shy away from acting as, or seeing yourself as, an aggressive person. However, Taurus also indicates physicality, so if and when you do get aggressive, you're probably inclined to physical aggression--or maybe to a kind of mock physical aggression, like competitive martial arts. But with Taurus's peaceful inclinations, you may be very inclined to suppress your aggression, physical or otherwise.
Everyone has aggression in them--it's part of the basic human survival instinct--and your aggression instinct has a nice boost from Aries. But for you, strong willed Aries is locked in a battle with strong willed Taurus for that strong willed aggression instinct. Like the stubborn parent and their equally stubborn adolescent child, neither is willing to give an inch. So the adolescent child (Arian Mars) acts out against the parent (Taurean Mars) by doing crazy things, and doing them just for the sake of rebellion. Setting fires and watching them burn is the psychological equivalent of dyed hair and a mohawk--your Aries Mars saying f-you to your Taurus Mars. But you also have Taurus keeping that instinct in check, so you're not an arsonist, just someone who kind of likes playing with fire.
None of that can be predicted just on the basis of Mars being in Taurus on the cusp of Aries in the ninth house (fire is a very literal symbol of expansion, which is the goal of the ninth house). Someone else with that same configuration might act it out in a very different way. Your "pyromania" is just how you yourself happen to respond to those competing energies... very creative way, btw!