If you reset the Master Password, all login data is removed. If you are using sync, that may be removed as well. Can you access the Windows passwords? Password:Recovery:Restore:Export https://www.ghacks.net/2018/07/18/how-to-export-firefox-passwords-in-firefox-57/ ++++++++++++++++++++++++++++++++++++ http://www.nirsoft.net/utils/passwordfox.html (Win) PasswordFox v1.58 - Extract the usernames/passwords stored in Firefox Copyright (c) 2008 - 2017 Nir Sofer Note: Some anti-virus show false positive. ++++++++++++++++++++++++++++++++++ Easily export your passwords from Firefox. https://github.com/kspearrin/ff-password-exporter Export your passwords from Firefox in a portable CSV or JSON format. It works on Windows, macOS, and Linux. +++++++++++++++++++++++++++++++++++ 3 Tools to Decrypt and Recover Passwords Saved in Firefox • Raymond CC https://www.raymond.cc/blog/how-to-find-hidden-passwords-in-firefox/ +++++++++++++++++++++++++++++++++++ https://www.ghacks.net/2018/07/18/how-to-export-firefox-passwords-in-firefox-57/ ++++++++++++++++++++++++++++++++++++ https://github.com/kspearrin/ff-password-exporter ++++++++++++++++++++++++++++++++++++ If you don't find a third party script or program you can trust, you can run a script in Firefox's Browser Console to spit out the list in CSV or JSON format. For example: JSON file: https://support.mozilla.org/questions/1258644 CSV: https://support.mozilla.org/questions/1253828 (copy/paste from console)

You aren't sharing the Firefox profile folder between Linux and Windows as this can cause issues ?