There's a kitsune star gem sure. Kitsune racial feats couldn't really be described as fox fire, but there's non-racial feats like faerie's strike which might be.
Foxfire (Sp): At 1st level, as a standard action, you can create up to four eerie spheres of light that function as dancing lights. While in possession of one or more of these spheres, you can attack one target within 30 feet as a ranged touch attack by directing a sphere at it. This sphere deals 1d6 points of fire damage. Whether or not the sphere hits, it disappears as if its duration ended. You can use this ability a number of times per day equal to 3 + your Charisma modifier.
That's a pretty terrible ability, are you sure you want it? The action economy is just awful and the damage is poor.
The vengeful comets spell has a similar visual but it's not kitsune-related. It does have a better action cost. There's probably other similar spells or items - but not kitsune-related that I can think of.
There is a PF2 ancestry feat that grants the ability to fling magical fire with your tail, but that would not work for PF1.