Chrome with a master password is IMO about as well protected against password theft as a password manager. (Which is to say, not terribly well. If something is running on your machine and has the same access rights you have, your chances of preventing it from stealing your passwords are fairly limited.)
May 20, 2020 Is Google Password Manager Safe? Jul 23, 2020 5 Best Password Manager Chrome Extension For Windows 10 Jun 07, 2019
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Jul 01, 2020 Severe vulnerabilities uncovered in popular password
5 Best Password Managers of 2020: 1Password, Bitwarden
Is Google Password Manager Safe? Jul 23, 2020 5 Best Password Manager Chrome Extension For Windows 10 Jun 07, 2019