You don’t know Tavis Ormandy? https://en.m.wikipedia.org/wiki/Tavis_Ormandy
His article confirmed my suspicion about any Password Manager, even Bitwarden and I never have or will use any Password Manager. I create all my Passwords individually with my own algorithm in my head and can always recreate them.
Using browser’s built-in password manager means you’re locking yourself permanently in that browser, or in case of Safari, locking yourself to Apple ecosystem. I refuse to do that. Beside, I’m sure you already heard about horror stories where Google suddenly ban their accounts. Imagine if you store your passwords in chrome and your account somehow mistakenly banned by Google. What a nightmare!
His arguments have merits though. Whenever I install my password manager extension in a new system, the first thing I do is to disable browser autofill in the password manager settings, which reduces possible exploits surface.