Great question! I’ve looked into this before, so let me break this down clearly for you.

First, the big picture: Chrome integrates the zxcvbn library—an open-source password strength estimator—to help boost your account security. Those files in the ZxcvbnData folder are the core dictionary datasets zxcvbn relies on to judge how easily your password could be cracked.

Here’s what each key file does:

• english_wikipedia.txt: Packed with common English words from Wikipedia. Zxcvbn uses this to flag passwords that rely on overused, easy-to-guess dictionary terms.
• female_names.txt/male_names.txt/surnames.txt: Lists popular first names and last names. These exist to catch passwords based on personal identifiers (like your own name), which are trivial to guess via social engineering.
• passwords.txt: A curated list of commonly leaked or previously cracked passwords. If your password is in here, Chrome will warn you right away—since these are already in attackers’ hands.
• us_tv_and_film.txt: Includes pop culture terms (show titles, character names, catchphrases) that people often use as passwords. These are surprisingly common and easy to brute-force.

The smaller files like manifest.json, manifest.fingerprint, and the _metadata folder? They’re just utility files: they help Chrome efficiently load, validate, and manage the dictionary datasets without reprocessing the entire text files every time.

How Chrome actually uses this data #

Whenever you create a new account or update a password in Chrome, its built-in password manager runs zxcvbn against your input. Using those dictionaries, zxcvbn calculates the password’s "crack time" and spots weak patterns—then Chrome shows you those familiar prompts like "This password is too weak" or "This password has been leaked before" to guide you toward more secure choices.

内容的提问来源于stack exchange，提问作者hongsy