Hmmmmmmmmmm

Ah, I had not found that page from my research. That seems to explicitly represent the intention that Kit can be whatever gender people want Kit to be.

A correction to make from the research I did:

Mozilla did not say that Kit is non-binary or uses they/them pronouns. Nor did they use they/them pronouns for Kit in official material. They pointedly avoided using pronouns for Kit at all, to keep it ambiguous. It seems like their intention is for the user to see Kit as whatever gender they want Kit to be.