I suspect it'll warn you if any of the accounts you've saved in Firefox (username/password) have been compromised. 1Password already does this¹ but this is like

I suspect it'll warn you if any of the accounts you've saved in Firefox (username/password) have been compromised. 1Password already does this¹ but this is likely the Firefox implementation of it. ¹ - https://blog.agilebits.com/2018/02/22/finding-pwned-passwords-with-1password/ https://blog.agilebits.com/2018/02/22/finding-pwned-password...