Yikes.
In case you were wondering why you were let go, it's clear from your response here that it was not about Firefox and VS code and that was just an excuse.
Your point of view isn't enough. If it were, you wouldn't be asking for help outside of your point of view. (ie, other people). That's why you're asking for help from outside your point of view.
The other half of the story is necessary to figure out what happened. If you only give your half of the story, you just want people to agree with you, uncritically. You're looking for a bunch of yes men who will agree with you no matter what you say or do. It's very nice, and comforting, and we all need that sometimes. But it doesn't challenge us or push us to do better. If all you want is a hug, there are lots of warm fuzzy places on the Internet. I like https://eyebleach.me/.
My advice, which may fall on deaf ears, but I'll give it anyway, since it was asked for, originally, is to work with a therapist and work with them on how to put your best foot forwards when working with other people, and maybe some anger issues. I'm saying this earnestly and I'm not making fun of you. There are an unlimited number of things a person can do that are career limiting views, don't let your "personality" be one of them.
Or do, I'm not the one who got fired for "using Firefox". But I wasn't there, maybe it really was about Firefox.