Firefox: How to Export login data
Warning:Your passwords in the exported file will not be encrypted and will be in a readable form to anyone who can view this file. Delete this file when finished.
You can also import login data from another browser.
Export usernames and passwords
- Click on the menu button to open the menu panel.
- Click Passwords. The Firefox about:logins page will open in a new tab.
- Click the logins menu icon (three dots), then click Export Logins….
- A dialog box will appear to remind you that passwords are saved as readable text. Click the Export… button to continue.
- You can choose the file name and location where this exported data will be saved.
Original: https://support.mozilla.org/en-US/kb/export-login-data-firefox