I voted "yes" above, but that is not really true.
I do keep passwords (and credit card numbers and such stuff) in a browser, but only in one browser and on one computer. That computer is administered by professionals who really know what they are doing, and logging in requires both a password, and a security key.
Other than that one exception, I do not store passwords in browsers. Nor in password managers. In order to do that, you need to nearly completely trust the browser, and the OS, and the administration of the machine. In general, I don't think that condition is met without professionals taking care of it. Instead, I store passwords myself, in an encrypted file that is kept on a machine that I administer myself. There are backups of the encrypted file in various locations. The encryption password is probably about 25 or 30 characters long, and I use trustworthy encryption software. So instead of using a browser or other complex software, I rely on relatively simple but powerful encryption.