: Hackers take passwords leaked from one site and test them on others (like Facebook). SentinelOne Guide to Securing Your Facebook Account
: This restricts results to plain text files, which are easy to read and often used for storing logs, lists, or configuration data. "extra quality" index of user password facebook filetype txt extra quality
The 2019 Collection #1–#5 breaches dumped ~22 billion unique credentials from thousands of sites. Attackers then filtered for domains associated with Facebook sign-ups. : Hackers take passwords leaked from one site
The search query "index of user password facebook filetype txt extra quality" is a classic example of Google Dorking index of user password facebook filetype txt extra quality