What files are required for NSS initialization when exporting Firefox passwords, and how do they differ across Firefox versions?

NSS initialization requires three files: `cert9.db`, `key4.db`, and `logins.json`, all located in the Firefox profile folder (e.g., `%APPDATA%\Mozilla\Firefox\Profiles\xxxxxxxx.default`). For Firefox versions 32.0 and above, login data is stored in `logins.json`; for versions 3.5 to 32.0, the file is `signons.sqlite`. The article notes that the Python code sets the profile path and calls `NSS_Init(profilePath)` using these files.