Therefore you need to store all this data into a proper password manager like 1Password, Bitwarden, KeepassXC, or Proton Pass. These store your data in encrypted containers that are password protected by a master password. Make sure you choose a strong master password and you do not forget it. They are much better than storing your passwords in your browser's password manager.
I had wanted to use the password manager, but instead I opted for the browser password manager. Although I only save non sensitive passwords there. But this post has made me understand that such browsers lack some security deficiencies. It's high time, I began to do the correct things even if I don't use them for sensitive things.