When Firefox reports a breached account, click on it to see the list of appropriate actions suggested. These include changing the password for that site, and other methods of strengthening your overall security on other sites.

Depending on your previous habits, a breach of one account could easily give the criminal an insight into how you access other sites. Some people use weak passwords and even the same password for all their sites. You'd then need to fix all other sites even if the first one closes or you unsubscribe from it.

Hi Tony!

Thank you, I understand what you're saying, but that doesn't solve my problem or answer my question.

I have resolved all but two of the breaches identified by Firefox.

1) One is for a website that no longer exists. Can I do anything about that one?

2) The other is for a website I checked into through my Facebook account. Should I change my Facebook password, too?

Thanks to anybody for their help!

1) One is for a website that no longer exists. Can I do anything about that one? - You can't do anything about the closed site, but the hackers now possibly have a list containing your name and email address associated together. If they also have the password, you may also have used the same password on another site, so that is a weak link in your security.

2) The other is for a website I checked into through my Facebook account. Should I change my Facebook password, too? - I don't know how exactly you did that, but if the breach revealed info about your use of Facebook to log in to another site, it could make sense to make your Facebook login more secure.

A breach notification will mean something different for each person. Essentially, it is an opportunity to re-examine the security on all your sites and do what makes the most sense for you in the circumstances.

Hi bjparrish,

I believe you are referring to Firefox Monitor, which works in collaboration with https://haveibeenpwned.com/.

Depending on the breach, login information may have been circulated on the web for bad actors to spread it around even more or access your accounts on different sites if the same login was used.

In both cases, deleting an account will not solve the issue as the breach has occurred, and specific information may have been compromised. Also, just because a website no longer exists does not mean you are safe as the information was already stolen and may be circulated.