Google Account Case

ChatGPT: Short answer: a standard Google account is not fully end-to-end encrypted. In most cases, Google can decrypt your data on the server side.

The site https://passwords.google.com says 'Only you can see your passwords', but it's NOT fully E2EE: https://www.pcmag.com/opinions/warning-dont-let-google-manage-your-passwords

Microsoft Account Case

Kinda the same as Google, without mentioning zero-knowledge or E2EE, it's called decryptable.

Good Vault Extension Options

Some notable ones (Free)

• Norton Idsafe (famous security company)
• Proton Pass (good features, and their privacy focus)
• Bitwarden (popular, open-source security)