By the way this is NOT a new Firefox logo. It's just the fox mascot drawing that may be used in other parts of the UI like the welcome screen after a new install, or on social media.

The actual logo remains unchanged.
On top of that nowhere in the announcement are the supposed pronouns mentioned: https://blog.mozilla.org/en/firefox/meet-kit/
Actually the whole thing may be bullshit. Literally the only Mozilla reference I can find to Kit's pronouns is a statement given to like one or two blogs, and it says that any pronoun is acceptable.
Kit (he/she/they/them/it) is the user’s constant companion. Wherever they choose to roam, Kit will accompany and guide them with clever, playful encouragement and support — giving the user the confidence to run free.
That's attributed to Mozilla here: https://www.neowin.net/news/firefox-has-killed-its-old-mascot-heres-what-the-new-cute-one-looks-like/
All other references seem to be chuds on X claiming that it's explicitly they/them and acting like Mozilla is making a big deal about that. As if it matters either way.
If you had some kind of reaction to this post you've fallen for culture war bullshit propaganda, congratulations.