Disabling Access to Google Chrome Saved Passwords in a Secure Way

Don't try to solve this through Chrome. Create a new OS-level account for the other person, then just don't give them your main OS password. This way, the other person will have no access to your Chrome settings at all (even to the actual files which store your passwords) – all programs will start from fresh state.

(This is literally the purpose of OS accounts, after all.)

• On Windows 10, additional accounts are available through Settings → Accounts → Family & other users → Other users → Add someone else to this PC → I don't have their sign-in information → Add a user without a Microsoft account.

  Alternatively: Run control userpasswords → Manage another account → Add a user account → Sign in without a Microsoft account → Local account.

  After the new accounts are created, you can switch between them through the Start menu, or by pressing WindowsL to lock the current desktop.

  
  

  ^{(Note: It's fine to choose "Microsoft account" if that person actually has one, e.g. if they're using OneDrive cloud storage or Outlook.com mail... most people don't have one, though.)}

• On Windows 7/Vista/XP use the same control userpasswords (or control userpasswords2).

• On macOS, see https://support.apple.com/guide/mac-help/set-up-other-users-on-your-mac-mtusr001/mac.

• On some Android phones, see https://support.google.com/pixelphone/topic/7083408.

• On Linux, useradd -m name followed by passwd name.