My Firefox accounts were messed up, so I made changes in a new Mac. Once I was able to switch accounts (just on my computer), my phone now won’t login

Hello, I’d recently bought 2 new Macs, (for different purposes), as well as preserving my account in my iOS Devices, Since i couldn’t remember my password, (and I’m no longer making music), I’ve changed several settings in my account (but JUST on one of the 2 Macs, and not on the iPhone, either), I was successful in making those changes (for that one Mac), now I must do the same with my other Devicesm they’re both MacOS (Tahoe), and iOS 26, iPad (there are 2 iPads). I’m not a Business, I’ve simply been trying to separate my Studying of a Language, and Classical Indian Literature, i.e.: Vedanta; from my other Mac, on what I’m calling “Secular”, I try not to mix both devices… Do I make sense to you? Essentially, my Firefox/Mozilla account is totally messed up, and not synching.