Do I understand it correctly that you have so far used Firefox Password Manager (FPM)?
Generally, in order to move passwords from an old manager to Password Depot (PWD), you first have to export your passwords from your original manager into a .csv file – and then import this file into PWD.
In the case of FPM, however, you need an additional add-on:
https://addons.mozilla.org/en-us/firefo ... -exporter/
1.) Download the Firefox add-on.
2.) Go to Tools > Options > Security.
3.) Click on the new option “Export Passwords.”
4.) Export your passwords to a CSV file.
5.) Open PWD.
6.) In PWD, either create a new password file or open an existing one
7.) Import your password file from FPM in the CSV format.
8.) Match the input fields of FPM to the fields of PWD. (If your FPM passwords had additional fields, these must be added manually to PWD.)
You should be done!